A sound wave of frequency f propagating through the air at a speed 
is reflected from a surface which is moving away from the source with a constant speed v. The frequency of the reflected wave as perceived by the observer at the position of the source will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
In the first case observer (surface) is moving away, so the perceived frequency is
In the second case source (surface) is moving away, so the perceived frequency is
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