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16 December, 10:50

What is an apparent change in the frequency of sound or light waves known as?

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  1. 16 December, 13:57
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    It is called Doppler effect (i. e, apparent change in the frequency of a sound, when the source, the observer and the medium are in the relative motion is called Doppler effect)
  2. 16 December, 14:31
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    The apparent change is the Doppler shift
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