physics final exam review: complete
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bright fringe
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in a double slit experiment, a wave from one slit arrives at a point on a screen one wavelength behind the wave from the other slit. What is observed at that point?
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dark fringe
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In a double slit experiment, a wave from one slit arrives at a point on a screen one-half wavelength behind the wave from the other slit. What is observed at that point?
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incandescent light is incoherent
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If two lightbulbs are placed side by side, no interference is observed because
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phase relationship
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coherence is the property by which two waves with identical wavelengths maintain a constant
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H
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In the figure above, which fringe represents a second-order maximum
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O
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In the figure above, O is the angle between the central maximum and the first-order maximum. What is the angle between fringes D and F?
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F would shift to the right
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In the double slit interference experiment that produced the figure above, the same slits are illuminated with light of greater wavelength. Which of the following would occur to the pattern shown in the figure?
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F would shift to the right
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In the double slit interference experiment that produced the figure above, the two slits are moved closer. Which of the following would occur to the pattern shown in the figure?
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sources must be coherent and monochromatic
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to produce a sustained interference pattern by light waves from multiple sources, which condition or conditions must be met?
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where the crest from one wavelength overlaps the trought from the other
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two beams of coherent light are shining on the same sheet of white paper. When referring to the crests and troughs of such waves, where will darkness appear on the paper?
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it decreases
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when a positive charge moves in the direction of the electric field, what happens to the electrical potential energy associated with the charge?
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The potential difference between the plates is equal to the applied potential difference
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charge buildup between the plates of a capacitator stops when
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negative charge, positive charge
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a capacitator consists of two metal plates; _____ is stored on one plate, and ___ is stored on the other.
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2.2*10 to the -6th
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A 0.25 nanoF capacitator is connected to a 9 V battery. What is the charge on the capacitator?
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4C
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A parallel-plate capacitator has a capacitance of C F. If the area of the plates is doubled while the distance between the plates is halved, the new capacitance will be
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3.6*10 to the -5
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A 0.50 nanoF capacitator is connected to a 12 V battery. Use the expression PE=.5C(change in V squared) to determine how much electrical potential energy is stored in the capacitator.
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the current decreases
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how is current affected if the nuber of charge carriers decreases?
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the current increases
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how is current affected if the time interval over which the charge passes through a given area decreases while the amount of charge remains the same?
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1.33 A
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the amount of charge that moves through the filament of a lightbulb in 2 seconds is 2.67 C. What is the current in the lightbulb?
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the move in zigzag patterns
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when electrons move through a metal conductor
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25 V
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what is the potential difference across a5.0 omega resistor that carries a current of 5.0 A?
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Ohm's Law
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which of the following does NOT affect a material's resistance?
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a copper wire 5 cm in length
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which of the following wires would have the least resistance, assuming that all the wires have the same cross-sectional area?
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a copper wire 5 cm in length at 10 degrees celcius
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which of the following wires would have the least resistance
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rate that they give off heat and light
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the power ratings on lightbulbs are measures of the
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converts less electrical energy to heat and light than a 100 W lightbulb
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when compared in a given time interval with other lightbulbs connected to a 120 V circuit, a 60 W lightbulb
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the resistance, the current, and the time the circuit operates
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Which set of information will allow you to calculate the kilowatt*hour usage?
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0.62 A
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If a 75 W lightbulb operaes at a voltage of 120 V, what is the current of the bulb?
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9 omega
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If a 325 W heater has a current of 6.0 A, what is the resistance of the heating element?
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11 omega
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An electric toaster requires 1100 W at 110 V. What is the resistance of the heating coil?
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shows the parts of a circuit and how the parts connect to each other
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Which of the following is the best description of a schematic diagram?
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12 V
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If the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire CD player?
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The terminal voltage of a bettery is equal to its emf
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Which of the following statements about a battery as a source of electric current is NOT true?
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The equivalent resistance is equal to the sum of the individual resistances
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a circuit is composed of a resistors wired in series. What is the relationship between the equivalent resistance of the circuit and the resistance of the individual resistors?
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the equivalent resistance is half the value of a single resistor
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two resistors having the same resistance value are wired in parallel.. How does the equivalent resistance compare to the resistance value of a single resistor?
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simplifying the circuit into groups of series and parallel circuits
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The equivalent resistance of a complex circuit is usually determined by
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8.0 omega
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Two resistors with values of 6.0 omega and 12 omega are connected in parallel. this combination is connected in series with a 4.0 omega resistor. What is the equivalent resistance of this combination?
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are longitudinal waves
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Sound waves
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rarefaction
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The trough of the sine curve used to represent a sound wave corresponds to a
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compression
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Which of the following is the region of a sound wave in which the density and pressure are greater than normal?
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pitch
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The highness or lowness of a sound is perceived as
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frequency
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Pitch depends on the ________ of a sound wave
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solids than through gases
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In general, sound travels faster through
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plane waves
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At a large distance from a sound source, spherical wave fronts are viewed as
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compression
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The point at which a ray crosses a wave front corresponds to a ________ of a sound wave
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one wavelength
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The distance between wave fronts of plane waves corresponds to _____ of a sound wave
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higher in pitch than
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A train moves down the track toward an observer. The sound from the train, as heard by the observer, is _______ the sound heard by a passenger on the train.
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all waves
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The Doppler Effect occurs with
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the pitch will not change
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If you are on a train, how will the pitch of the train's whistle sound to you as the train moves?
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an area perpendicular to the direction of propogation
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The property of sound called intensity is proportional to the rate at which energy flows through
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one-ninth
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At a distance of 3 m, the intensity of a sound will be ________ the intensity it was at a distance of 1 m.
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power
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the intensity of a sound at any distance from the source is directly proportional to the sound's
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decibels
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the perceived loudness of a sound is measured in
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is approximately logarithmic
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a sound twice the intensity of the faintest audible sound is not perceived as twice as loud because the sensation of loudness in human hearing
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resonance
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When the frequency of a force applied to a system matches the natural frequency of vibration of the system, _______ occurs.
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a standing wave
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The Tacoma Narrows Bridge collapsed in 1940 when winds caused _______ to build up in the bridge.
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all harmonic are present
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When an air column vibrates in a pipe that is open at both ends,
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only odd harmonics are present
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When an air column vibrates in a pipe that is closed at one end,
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1000 Hz
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If a guitar string has a fundamental frequency of 500 Hz, what is the frequency of its second harmonic?
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2L
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The wavelength of the fundamental frequency of a vibrating string of length L is
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harmonics
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The quality of a musical tone of a certain pitch results from a combination of
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timbre
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Musical instruments of different types playing the same not may often be identified by the ____ of their sounds.
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3 Hz
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How many beats per second are heard when two vibrating forks having frequencies of 342 Hz and 345 Hz are held side by side?
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a ball bouncing on the floor
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Which of the following is NOT an example of approximate simple harmonic motion?
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displacement
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Vibration of an object about an equilibrium point is called simple harmonic motion when the restoring force is proportional to
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velocity reaches a maximum
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A mass attached to a spring vibrates back and forth. At the equilibrium point, the
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acceleration reach a maximum
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A mass attached to a spring vibrates back and forth. At maximum displacement, the spring force and the
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elastic potential
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A mass-spring system can oscillate with simple harmonic motion because a compressed or stretched spring has which kind of energy?
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amplitude
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the angle between the string of a pendulum at its equilibrium position and at it maximum displacement is the pendulum's
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amplitude
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For a mass hanging from a spring, the maximum displacement the spring is stretched or compressed from its equilibrium position is the system's
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14 degrees
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A pendulum swings through a total of 28 degrees. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration? (disregard friction)
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period
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For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?
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frequency
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For a system in simple harmonic motion, which of the following is the number of cycles or vibrations per unit of time?
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they are inversely related
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how are frequency and period related in simple harmonic motion?
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n/2 seconds
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If a pendulum is adjusted so that its frequency changes from 10 Hz to 20 Hz, its period will change from n seconds to
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9
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By what factor should the length of a simple pendulum be changed in order to triple the period of vibration?
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the restoring force
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which of the following feature of a given pendulum changes when the pendulum is moved from Earth's surface to the moon?
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transverse
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A wave travels through a medium. As the wave passes, the particles of the medium vibrate in a direction perpendicular to the direction of the wave's motion. The wave is
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pulse wave
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Which of the following is a single nonperiodic disturbance?
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crests
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Each compression in the waveform of the longitudinal wave shown above corresponds to what feature of the transverse wave below it?
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troughs
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Each stretched region of the waveform of the longitudinal wave shown above corresponds to what feature of the transverse wave below it?
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the energy carried by the wave
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Which of the following most affects the wavelength of a mechanical wave moving through a medium?
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differences in frequency
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suppose that two sound waves passing through the same medium have different wavelengths. Which of the following is most likely to be the reason for the differing wavelengths?
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9
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When a mechanical wave's amplitude is tripled, the energy the wave carries in a given time interval is increased by a factor of
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are displacements of matter
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two mechanical waves can occupy the same space at the same time because waves
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water waves in a ripple tank
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the superposition of mechanical waves can be observed in the movement of
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the waves continue to change
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two waves traveling in opposite directions on a rope meet and undergo complete destructive interference. Which of the following best describes the waves a moments after the waves meet and coincide?
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the sum of
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When two mechanical waves coincide, the amplitude of the resultant wave is always ____ the amplitude of each wave alone.
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constructive interference
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[the picture shows two waves on the same side of equilibrium] Which of the following types of interference will occur when the pulses in the figure above meet?
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destructive interference
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[the picture shows two waves on opposite sides of equilibrium] Which of the following types of interference will occur when the pulses in the figure above meet?
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complete destructive interference
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[the picture shows two waves of identical size on opposite sides of equilibrium] Which of the following types of interference will occur when the pulses in the figure above meet?
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reflected and inverted
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Waves arriving at a fixed boundary are
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the same frequency, amplitude, and wavelength traveling in opposite directions
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Standing waves are produced by periodic waves of
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L
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[the picture shows a diagram of a length of string (length L) in a standing wave with two crests and three nodes] the standing wave shown in the diagram above would be produced on a string of length L by a wave having wavelength
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three nodes and two antinodes
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[the picture shows a diagram of a length of string in a standing wave with two crests and three places where all the lines meet] How many nodes and antinodes are shown in the standing wave above?
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4
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A 3.0 m long stretched string is fixed at both ends. If standing waves with a wavelength of two-thirds L are produced on this string, how many nodes will be formed?
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2
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What is the fewest number of nodes a standing wave can have?
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radio waves
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Which portion of the electromagnetic spectrum is used in a television?
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visible light
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which portion of the electromagnetic spectrum is used in a microscope?
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0.10 m
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What is the wavelength of microwaves of [3.0 *10 to the 9th] Hz frequency?
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3.0 * 10 to the 12th Hz
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What is the frequency of infrared light of [1.0*10 to the -4th] m wavelength?
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all forms of electromagnetic radiation travel at a single speed in a vacuum
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The relationship between frequency, wavelength, and speed holds for light waves because
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the more spread out light becomes
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the farther light is from a source
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one-fourth as bright
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If you are reading a book and you move twice as far away from the light source, how does the brightness at the new distance compare with that of the old distance? It is
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diffuse, rough
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Snow reflects almost all of the light incident upon it. However, a single beam of light is not reflected in the form of parallel rays. This is an example of ____ reflection off a ____ surface
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smooth, specular
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A highly polished finish on a new car provides a _____ surface for ______ reflection.
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close to the mirror's surface
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When incoming rays of light strike a flat mirror at an angle close to the surface of the mirror, the reflected rays are
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the angles of incidence and reflection are equal
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When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray strikes the mirror's surface, the angles of incidence and reflection are measured from the normal and
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14 degrees from the normal
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If a light ray strikes a flat mirror at an angle of 14 degrees from the normal, the reflected ray will be
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Electrons are added to the rod.
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What happens when a rubber rod is rubbed with apiecec of fur, giving it a negative charge?
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like signs.
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A repelling force occurs between two charged objects when the charges are of...
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unlike signs.
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An attracting force occurs between two charged objects when the charges are of...
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electrons are remover from the rod.
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When a glass rod is rubbed with silk and becomes positively charged,...
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conserved.
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Electric charge is...
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must be negative.
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If a positively charged glass rod is used to charge a metal bar by induction, the charge on the bar...
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conductors.
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Charge is most easily transferred in...
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Ball 4 has a positive charge.
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In the diagram shown above, the circles represent small balls that have electric charges. Ball 1 has a negative charge, and ball 2 is repelled by ball 1. Next, you see that ball 2 repels ball 3 and that ball 3 attracts ball 4. What is the electric charge on ball 4?
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Electrical conductors have electric charges that move freely.
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Which sentence best describes electrical conductors?
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Charges within electric insulators do not readily move.
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Which statement is the MOST correct regarding electric insulators?
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induction.
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The process of charging a conductor by bringing it near another charged object and then grounding the conductor is called...
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polarization.
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The figure above demonstrates charging by...
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contact.
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Both insulators and conductors can be charged by...
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polarization.
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A surface charge can be produced on insulators by...
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induction.
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Conductors can be charged by _________, while insulators cannot.
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induced; residual
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When a charged body is brought to close to an uncharged body without touching it, a(n) _________ charge may result on the uncharged body. When a charged body is brought into contact with an uncharged body and then is removed, a(n) __________ charge may result on the uncharged body.
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Forces are either attractive or repulsive.
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Which of the following is NOT true for both gravitational end electric forces?
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1/25
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Two point charges, initially 2 cm apart, are moved to a distance of 10cm apart. By what factor does the resulting electric force between them change?
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9
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If the charge is tripled for two identical charges maintained at a constant separation, the electric force between them will be changed by what factor?
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1/9
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Two point charges, initially 1 cm apart are moved to a distance of 3 cm apart. By what factor do the resulting electric and gravitational forces between them change?
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at the origin
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Two positive charges, each of magnitude q, are on the y- axis at points y= +a and y= -a. Where would be a third positive charge of the same magnitude be located for the net force on the third charge to be zero?
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Electric field lines never cross each other.
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Which isthe MOST correct statement regarding the drawing of electric field lines?
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the shape of the conductor
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The relative distribution of charge density on the surface of a conducting solid depends upon which of the following?
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at the sphere's outer surface
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Where is the electric field of an isolated, uniformly charged, hollow metallic sphere greatest?
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is zero.
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A conductor that is in electrostatic equilibrium has an electric field inside the conductor that...
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perpendicular to the conductor's surface.
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The electric field just outside a charged conductor in electrostatic equilibrium is...
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resides entirely on the conductor's outer surface.
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For a conductor that is in electrostatic equlibrium, any excess charge...
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where the radius of curvature is smallest.
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If an irregularly shaped conductor is in electrostatic equlibrium, charge accumulates...
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charge and distance.
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Electric field strength depends on...
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The force between the charges increases.
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What occurs when two charges are moved close together?
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vector
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Resultant force on a charge is the __________ sun of the individual forces on that charge.
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the same size as the object.
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The image of an object in a flat mirror is always...
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multiple, object
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When two parallel mirrors are placed so that their reflective sides face each other, _________ images from. This is because the image in one mirror becomes the _________ for the other mirror.
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6.0 m
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If you stand 3.0m in front of a flat mirror, how far from you would your image be int the mirror?
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virtual, upright, and magnification equal to one
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Which of the following best describes the image produced by a flat mirror?
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the distance from the object to the mirror.
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When the reflection of an object is seen in a flat mirror, the distance from the mirror to the image depends on...
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paraxial rays
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The mirror equation and ray diagrams are valid concepts only for what type of rays?
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interdependent
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Object distance, image distance, and radius of curvature are __________ for curved mirrors.
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one- half
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For a spherical mirror, the focal length is equal to ______ the radius of curvature of the mirror.
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7.14 cm
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A concave mirror forms a real image at 25.0 cm from the mirror surface along the principal axis. If the corresponding object is at 10.0cm distance, what is the mirror's focal length?
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none of the light would pass through.
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If you looked at a light through a lenses from two polarizing sunglasses that were overlapped at right angles to each other,...
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virtual, enlarged, and upright
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In the diagram shown above, the image of object B would be...
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virtual, reduced, and upright
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In the diagram shown above, the image of object B would be...
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real, inverted, and magnification greater than one
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Which best describes the image of a concave mirror when the object is located somehwhere between the focal point ans twice the focal-point distance from the mirror?
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real, inverted, and magnification less than one
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Which best describes the image of a concave mirror when the object is at a distance greater that twice the focal-point distance from the mirror?
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virtual, upright, and magnification greater than one
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Which best describes the image of a concave mirror when the object's distance from the mirror is less that the focal-point distance?
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spherical aberration
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A parabolic mirror, instead of a spherical mirror, can be used to reduce the occurence of which effect?
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close to, far from
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When parallel rays that are also parallel to the principal axis strike a spherical mirror, rays that strike the mirror __________ the principal axis are focused at the focal pint. Those rays that strike the mirror ___________ the principal axis are focused at points between the mirror and the focal point.
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refraction
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Part of a pencil that is placed in a glass of water appears bent in relation to the part of the pencil that extends out of the water. What is this phenomenon called?
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medium
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Refraction is the bending of a wave disturbance as it passes at an angle from one __________ to another.
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A fish appears closer to the surface of the water than it really is when observed from a riverbank.
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What is an example of refraction?
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wavelength
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The __________ of light can change when light is refracted beacuse the medium changes
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wabvelength
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The __________ of light can change when light is refracted beacuse the velocity changes.
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striking a wood surface at an angle of 75 degrees
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Light is NOT refracted when it is...
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it is bent toward the normal to the surface.
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When light passes at an angle to the normal from one material into another material in which its speed is lower,...
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bent toward the normal.
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When a light ray moves from air into glass, which had a higher index of refraction, its path is...
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18.0 degrees
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A ray of light in air is incident on an air- glass boundary at an angle of exaclty 30.0 degrees with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refracted ray withing the glass with respect to the normal?
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real
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What type of image is formed when rays of light actually intersect?
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real or virtual
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What type of image does a converging lens produce?
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The ray passes throught the focal point, F.
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In what direction does a parallel ray from an object proceed after passing through a converging lens?
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real, upright, and magnified
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All of the following images can be formed by a converging lens EXCEPT which one?
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virtual, inverted, and same size
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All of the following images can be formed by a converging lens EXCEPT which one?
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always positive
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The focal length for a converging lens is...
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5.71 cm
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An obeject is placed 20.0 cm from a thin converging lens along the axis of the lens. If a real image forms behind the lens at a distance of 8.00 cm from the lens, what is the focal length of the lens?
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141
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A film projector produces a 1.5 m image of ahorse on ascreen. If the projector lens is 4.00m from the screen and the size of the horse on the film is 1.07cm, what is the magnitude of the magnification of the image?
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at O
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In the diagram of a compound microscope shown above, where would you place the slide?
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total internal reflection
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Which of the following describes what will happen to a ligh ray incident on a glass-to-air boundary at greater thatn the critical angle>
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mirages
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Atmospheric refraction of light rays is responsible for which of the following effects?
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All wavelenghts refract at the same angle.
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Which is NOT correct when describing the formation of rainbows?
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unlike poles repel each other
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which of the following situations is NOT true for magnets?
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the magnitude is greatest close to the poles
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where is the magnitude of the magnetic field around a permanent magnet the greatest?
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all of the above (the number of field lines that cross a certain area, ABcosθ, surface area x magnetic field component normal to the plane of surface)
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one useful way to model magnetic field strength is to define a quantity called magnetic flux. which of the following definitions of magnetic flux is correct?
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magnetic field lines appear to end at the northpole of a magnet
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all of the following statements about magnetic field lines around a permanent magnet are true except which one?
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a
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which compass needle orientation in the figure might correctly describe the magnet's field at that point?
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domain; no
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a microscopic magnetic region composed of a group of atoms whose magnetic fields are aligned in a common direction is called a _. in mose materials when these groups are randomly distributed, the substance will show _ magnetism.
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line up mainly in one direction
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in a magnetized substance, the domains...
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domain alignment persists after the external magnetic field is removed
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in a permanent magnet...
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the orientation of domains fluctuates
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in soft magnetic materials such as iron, what happens when an external magnetic field is removed?
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blackbody
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What term is used to describe a perfect radiator and absorber of electromagnetic radiation?
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the ultraviolet catastrophe
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Classical electomagnetict theory predicted that the energy radiated by a blackbody would become infinite as the wavelength became shorter. What was the contradiction between observation and this result called?
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quanta
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What were the units of light energy emitted by blackbody radion origianlly called?
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3.00 x 10^14 Hz
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What is the frequency of a photon with an energy of 1.99x10^-19 J?
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1.4 eV
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A monochromatic light beam with a quantum energy value of 3.00eV is incident upon a photocell. The work function of the photo cell is 1.6 eV. What is the maximum kinetic energy of the ejected electrons?
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empty space
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According to the Rutherford model, what makes up most of the volume of an atom?
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nucleus
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What is the concentration of positive charge and the mass in Rutherford's atomic model called?
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emission
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When a high potential difference is applied to a low pressure gas, what kind of spectrum will the gas emit?
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The wavelengths of the spectrum are characteristics of the element emitting the light.
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Which of the following statements is true about emission spectra?
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Photons are emitted when electons jump froma higher energy to a lower energy state.
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What causes the bright lines in the emission spectum of an element to occur?
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the scattering of alpha particles
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What observation confirmed de Broglie's theory of matter waves?
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the more accurately one value is measued, the less accurately the other value is known
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According to the Heisenberg uncertainty principle, which of the following statements about the simultaneous measurements of position and momentum is true?
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The electron may be found at various distances from the nucleus.
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Why is a probability wave required to describe an electron's location?
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protons and nuetrons
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The nucleus of an atom is made up of which of the following combinations of particles?
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the number of protons in the nucleus
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To which of the the following is the atomic number of a given element equivalent?
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the number of protons and nuetrons present
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What does the mass number of a nucleus indicate?
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124
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If there are 128 nuetrons in Pb-210, how many nuetrons are found in the nucleus of Pb-206?
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the energy released when the nucleons bind together to form a stable nucleus
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What is the binding energy of a nucleus?
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becomes stronger
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As the number of proton in the nucleus increases, the repulsive force....
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gamma
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Of the main types of radiation emitted from naturally radioactive isotopes, which is the most penetrating?
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atomic number decreases by two
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The alpha emission process results in the daughter nucleus differing in what manner from the parent?
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atomic number changes by one
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Thee beta emission process results in the daughter nucleus differing in what manner from the parent?
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4/2 He
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In the radioactive formula 220/86 Rn ----> 216/84Po + X what does X represent?
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3
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How many half-lives does it take for a radioactive substance to decay to 12.5 perceent of its original amount?
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140/56Ba , 93/36Kr
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What daughter isotopes are produced when a neutron combines with a nucleus of 235/92 U? Assume that three nuetrons are also produced in the reaction.
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fission only
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At this time, all nuclear reactors operate through.....
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Strong
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Which interaction of nature binds nuetrons and protons into nuclei?
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weak
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Which interaction of nature depends on the distance through which it acts and is involved in beta decay?
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gravitational
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Which interaction of nature holds the planets, stars, and galexies together, even though its effect on elementary particles is negligible?
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electromagnetic
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Which interaction of nature binds atoms and molecules by attracting unlike charges and repulsing like charges?
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the angle between true north and north indicated by a compass
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which statement describes earths magnetic declination?
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the geographic south pole of earth and earths magnetic north pole are relatively close to each other
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which of the following statements about earths magnetic field is true?
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decreasing the current and reducing the number of coils
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which of the following modifications to a solenoid would be most likely to decrease the strength of its magnetic field?
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the magnetic field, B
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according to the right hand rule, if a current carrying wire is grasped in the right hand with the thumb in the direction of the current the four fingers will curl in the direction of...
question
form concentric circles around the wire
answer
the lines of the magnetic field around a current carrying wire...
question
all of the above (when the particle is stationary, when the particle is moving parallel to the magnetic field, when the particle is not charged)
answer
under which of the following conditions is thenet magnetic force on a charged particle equal to zero?
question
1.9x10^-15
answer
an electron that moves with a speed of 3.0x10^4 m/s perpendicular to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (qe = 1.60x10^-19C)
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perpendicular to both the current and the magnetic field
answer
the direction of the force on a current carrying wire in an external magnetic field is ...
question
circle
answer
what is the path of an electron moving perpendicular to a magnetic field?
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the two wires will attract eachother
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consider two long straight parallel wires, each carrying a current I. if the currents move in the same direction...
question
high temperature field
answer
a current can be induced in a closed circuit without the use of a battery or an electrical power supply by moving the circuit through a...
question
both magnitude and direction
answer
a loop of wire is rotated 360 degrees across an external magnetic field. during one period of revolution the induced current changes in...
question
-54V
answer
a coil with 150 turns and a cross sectional area of 1m^2 experiences a magnetic field whose strength increases by +0.65T in 1.80s. the plane of the coil is perpendicular to the plane of the applied magnetic field. what is the emf in the coil?
question
160V
answer
a generators maximum output is 220V. what is the rms potential difference? (round up)
question
0.60T
answer
a current carrying wire 0.50m long is positioned perpendicular to a uniform magnetic field. if the current is 10.0 A and there is a resultant force of 3.0 N on the wire due to the interaction of the current and field, what is the magnetic field strength?
question
5.1A
answer
the rms current in an ac current is 3.6 A. find the maximum current.
question
540 V
answer
a transformer has 15 turns in its primaryand 6750 turns in its secondary. if the potential difference across the primary is 1.2 V, what is the potential difference across the secondary?
question
in the oscillating electric and magnetic fields
answer
where is energy stored in electromagnetic waves?
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where the crest from one wave overlaps the trough from another
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two beams of coherent light are shining on the same sheet of white paper. when referring to the crests and troughs of such waves, where will the darkness appear on the paper?
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constant
answer
for stable interference to occur the phase difference must be
question
6.0 x10^2nm
answer
the distance between two slits in a double slit interference experiment is 2.9x10^-6m. the first order bright fringe is measured on a screen at an angle of 12 degrees from the central maximum. what is the wavelength of the light?
question
550nm
answer
monochromatic light shines on the surface of a diffraction grating with 5.3x10^3 lines/cm. the first order maximum is observed at an angle of 17 degrees. find the wavelength.
question
they remain in phase
answer
if light waves are coherent...
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laser
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which of the following is a device that produces an intense, nearly parallel beam of coherent light?
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all of the above (to treat glaucoma, to measure distance, to read bar codes)
answer
a laser can be used to...
question
both monochromatic and coherent
answer
the diagram below represents a group of light waves emitted simultaneously from a single source. these light waves would be classified as...
question
b
answer
which diagram best represents the phenomenon of diffraction
question
c
answer
which pattern of bright and dark bands could have been produced by a beam of monochromatic light passing through a single narrow slit?
question
a
answer
monochromatic light passes through a single narrow slit, forming a diffraction pattern on a screen. which graph best represents the light intensity of the single slit diffraction pattern for monochromatic light?
