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Electromagnetic Waves
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How fast do EM waves travel in an empty space or vacuum?
3.0 x 10⁸ m/s
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If the frequency of EM wave increases, what will happen to its wavelength?
decrease
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What kind of waves are used in the medical field to kill cancer cells or tumors?
gamma
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TRUE or FALSE: A wave is an energy created by vibrations that propagate in all direction.
TRUE
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TRUE or FALSE: Mechanical waves like earthquake waves can travel even without a medium.
FALSE
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Which is the only EM wave that is detectable by the human eye?
visible light
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What do you call the part of a sinusoidal wave line which refers to the highest point of a wave?
Crest
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What property of EM wave refers to capacity of the wave to do work?
Energy
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What do you call the part of a sinusoidal wave line which refers to distance from one crest to the next crest or one trough to the next trough?
Wavelength
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What is the relationship between frequency and energy of EM waves?
directly proportional
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What property of EM wave refers to number of waves that pass a fixed point in a given amount of time?
Frequency
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What kind of EM wave is often used in killing bacteria or sterilization of water and medical equipments?
UV or ultraviolet
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TRUE or FALSE: All electromagnetic waves travel at the speed of light.
TRUE
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Which type of EM wave is often used in radio and TV broadcasting?
radio waves
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EM wave often used in high speed cooking.
microwaves
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