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Physics Review Question Unit: Waves Year: 1997 Question#: 38 Question: The amplitude of a sound wave is to its loudness as the amplitude of a light wave is to its (1 ) brightness (2 ) frequency (3 ) color (4 ) speed What is this question really asking? Explanation by: Nicole J [ Return to question menu ] Answer 1 brightness CORRECT The amplitude shows the brightness of a light wave, the higher the amplitude, the brighter the light. return to top Answer 2 frequency INCORRECT The amplitude of a wave is the distance from the midpoint to the crest of the wave, the frequency is the amount of vibrations that occur within a wave. return to top Answer 3 color INCORRECT Color can only be seen by the way an object reflects certain frequencies of light, it has nothing to do with the amplitude. return to top Answer 4 speed INCORRECT Speed of a wave depends on the properties of the medium, as a light wave passes from air to glass its speed slows down, nothing to do with amplitude. return to top What's this question really asking? If the amplitude of a sound wave shows how loud it is, than what does the amplitude show in a light wave? return to top |
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