Q. Doppler effect was proposed by?
Solution:
? The apparent change in the observed frequency of a wave due to the relative motion between the source of wave and the observer is called Doppler effect.
Eg: One of the most common examples is that of the pitch of a siren on an ambulance or a fire engine. You may have noticed that as a fast moving siren passes by you, the pitch of the siren abruptly drops in pitch. At first, the siren is coming towards you, when the pitch is higher.
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