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A stationary source emitting sound of fr...

A stationary source emitting sound of frequency `680Hz` is at the origin . An observer is moving with the velocity `sqrt(2)(hati + hatj)m//s` at a certain instant. If the speed of sound in air is `340m//s` then the apparent frequency received by him at that instant is

A

`680Hz`

B

`676Hz`

C

`684Hz`

D

either `676Hz` or `684Hz`

Text Solution

Verified by Experts

The correct Answer is:
D

`V_(0)=sqrt(2)sqrt(1^(2)+1^(2))=2m//s` moving away from source or towards the source.
`:.n.=n((V+-V_(0))/(V))`
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