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A siren emitting a sound of frequency 80...

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of `15ms^-1`. Then the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air `=330ms^-1`)

A

`885Hz`

B

`765Hz`

C

`800Hz`

D

`838Hz`

Text Solution

Verified by Experts

The correct Answer is:
D
`n._(ref)=n[(V)/(V-V_(S))]`
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