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A bat moving at 10 ms^(-1) towards a wal...

A bat moving at 1`0 ms^(-1)` towards a wall sends a sound signal of 8000 Hz towards it. On reflection it hears a sound of frequency f. The value of g in Hz is close to (speed to sound `= 320 ms^(-1)`) :

A

8424

B

8516

C

8258

D

8000

Text Solution

Verified by Experts

The correct Answer is:
B
`f'=f_(0)((V+V_(S))/(V-V_(S)))=8000 xx((330)/(310))=8516`
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ALLEN-WAVES AND OSCILLATIONS-Part-1(Exercise-05)[A]
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