H.S. 7th grade Chapter 2 Using Light- Essay

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What are the different types of waves?
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The different types of waves are light, Sound Sunlight
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How are mechanical waves produced?
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It is when an energy source enters into a medium and causes the medium to vibrate
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In what unit is the frequency of a wave measured?
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Hertz or Hz
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When a charged particle is in motion does the magnetic field change?
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Yes the magnetic field changes.
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What are the 7 different types of visible lights?
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The 7 types of visible light are: Radio waves, Microwaves,infrared Rays, X-rays, ultraviolet rays, gamma rays, and visible light
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What is an example of a wave that requires a medium?
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An example of a wave that requires a medium is a sound from a person’s mouth.
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What kind of wave can travel without a medium?
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Electromagnetic waves don’t require medium to travel.
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What are the four basic properties of waves?
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the four basic properties of waves are amplitude, wave length, frequency, and its speed
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Use a wave diagram to label the amplitude and wave length of a wave. In a light wave, which of these properties tells you the color of the light.
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In a light wave visible lights tells you the color of the light.
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which wave properties are distances?
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The wave property that are distances is wavelength.
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Which properties are measured relative to time?
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Frequency is the property that are measured relative to time.
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Why can electromagnetic radiation travel though empty space?
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Electromagnetic waves can travel through vaccum or empty space because they are a medium by itself
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List the waves in the electromagnetic spectrum in order from longest wave length to shortest wave length. Make sure to include all the colors of the light.
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Radio waves, microwaves, Infrared rays, ultraviolet rays, x-rays, and gamma rays. ROY G. BIV
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Why are some electromagnetic waves harmful to you while others are not? What is the strongest electromagnetic waves?
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Some Electromagnetic waves are harmful because some produces a lot of radiation that can harm the body. Gamma Rays are the strongest
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List one or more types of electromagnetic waves that are useful for each of these purposes.
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Radio waves are used in our daily lives as AM and FM radio. Inform people that there is danger or to locate someone. Microwaves are waves used to heat your food. Infrared rays are used in heat lamps, X-rays are used for searching for broken bones or diseases.
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What three things may happen to the light that strikes an object
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lights are transmitted, absorbed and reflected
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What causes light rays to bend when they enter a new medium at an angle
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When light rays enter a new medium at an angle, the change in speed causes the light rays to bend.
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List the parts of the eye in the order in which light interacts with them
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Cornea, pupil, iris, retina, rods, cones.
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How does an image formed on the retina
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Image are form through refraction by cornea lens.

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