science ch. 11 – Flashcards
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when a wave strikes an object and bounces off
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reflection
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repeating disturbances that transfer energy through matter or space
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waves
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highest point of a transverse wave
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crest
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region where the medium is crowded and dense in a compressional wave
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compression
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wave that makes matter in the medium move back and forth at right angles to the direction the wave travels
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transverse wave
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ability of two or more waves to combine and form a new wave
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interference
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lowest point of a transverse wave
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trough
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material through which a wave transfers energy
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medium
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the bending of waves around a barrier
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diffraction
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less dense region of a compressional wave
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rarefaction
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ability of an object to vibrate by absorbing energy at its natural frequency
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resonance
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wave in which matter in the medium moves back and forth in the same direction the wave travels
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compressional wave
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distance between one point in a wave and the nearest point just like it
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wavelength
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measure of how many wavelengths pass a fixed point each second
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frequency
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the angle of incidence is equal to the angle of reflection
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law of reflection
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measure of the energy in a wave
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amplitude
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a special type of wave pattern that forms when waves of equal wavelength and amplitude traveling in opposite directions continuously interfere with each other
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standing wave
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the bending of a wave caused by a change in its speed as it moves from one medium to another
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refraction
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compressional
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which wave carries more energy? a transverse or compressional wave?
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compressional waves have more frequency than transverse waves
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how does the frequency of a transverse wave compare with that of a compressional wave?
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they know because the matter in the wave can be traveling either at right angles or back and forth
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ho do scientists know that seismic waves can be either compressional or transverse?
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surfers like waves with higher amplitudes because that means the wave will be bigger
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why do surfers like water waves with high amplitudes?
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no it wouldn't because only a trained opera singer can get that high of a pitch to break the objects
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will loud sounds from traffic near a school break glass objects inside the school? explain
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meters
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what units are used with wavelength?
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hertz
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what units are used with frequency?
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meters/second
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what units are used with wave speed?
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if an obstacle is much larger than the wavelength of a wave, almost no ____ occurs
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diffraction
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when you shake a rope up and down, you create a ______ wave
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transverse
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when part of Earth's crust beaks, ____ waves pass through Earth
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seismic
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in a given medium, as the frequency of a wave increases, its speed ____
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remains the same
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in a standing wave, the point at which the medium doesn't move is called the ____
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node
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we get light by the sun reflecting off the moon to the Earth
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the moon doesn't produce light by itself. how do we get moon light?
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...
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in a given medium, how are wavelength and frequency of a wave related? using this relationship, state which would be more diffracted, waves with high frequency or waves with low frequency.
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light can travel without one because it is non-mechanical so therefor it does not need a medium
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how do you know that light is a kind of wave that can travel without a medium?
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what happens is the seed stays the same, the wavelength decreases, and the frequency and amplitude stay the same
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you are creating a wave on a rope by shaking the ripe back and forth. if you shake your hand the same distance but faster, what happens to the amplitude, frequency, wavelength, and speed?
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the refraction takes place at the normal
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when refraction takes place because a wave is passing from one medium to another medium with a different density what what part of the media does the refraction take place?
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no there isn't because once they interfered, the energy gets redistributed to each wave
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when two waves interfere is there a loss of energy in the system? explain
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you can see your reflection in an unbroken mirror because the light reflects off the mirror to your eyes. if it is broken the pieces might have been bent or broken off so it would not reflect to your eyes
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explain why you can see your reflection in an unbroken mirror but cannot see your reflection in a broken mirror.
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they can produce different frequencies because if you loosen or tighten them they make different sounds which are caused by the vibrations
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how can sound waves with different frequencies be produced by the same guitar string?
