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A sound source, emitting sound of consta...

A sound source, emitting sound of constant frequency, moves with a constant speed and crosses a stationary observer. The frequency (n) of sound heard by the observer is plotted against time (t). Which of the following graphs represents the correct variation :-

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
D
`underset("source ") overset(V_(s))to ` Observer velocity =0
when Approaching `= ""^(n ) [(v) /(V-V_(s))]`
when Its going away `= ""^(n ) [(V)/(V+V_(s))]`
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