GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An apparent change in frequency of a wave due to the relative motion between a wave source and an observer
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When sound changes pitch
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When light changes color
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An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.
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Detailed explanation-1: -Generally, the doppler effect can be defined as the change in wave frequency (whether it is light or sound) during relative motion between the source of the wave and the observer. This effect can be observed every time a source wave is moving in relation to the observer.
Detailed explanation-2: -The Doppler effect or Doppler shift (or simply Doppler, when in context) is the apparent change in frequency of a wave in relation to an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842.
Detailed explanation-3: -The Doppler effect is the apparent change in frequency of a wave as the source of the wave is moving toward or away from an observer or vice-versa. Any object that emits waves, whether sound waves or electromagnetic waves, will have an actual frequency of emitting waves and an apparent frequency.