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5 Cards in this Set
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- Back
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What is the relationship between water and ocean waves, or between air and sound waves, or between a rope and the waves produced by shaking it up and down?
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The water, the air, and the rope are the wave mediums that the waves travel through.
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___ and ___ are both low frequency waves compared to visible light.
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UHF
VHF |
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You may have at some time seen a ''black light'' - a devise that produces ___________ waves. A black light can be used for such dramatic effects as making objects glow eerily or changing the colors in your striped shirt into strange colors. Actually, the ''black light'' looks purple because it emits visible violet light in addition to invisible ultraviolet light.
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ultraviolet light
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_________ are useful in therapeutic radiology. Lead is often used as protective lining in x-ray rooms or radioactive cobalt units to shield against gamma rays.
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gamma rays
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You may remember that some types of radio waves can be made to travel around the curve of the earth's surface by bouncing them off the __________.
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ionosphere
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