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If a source emitting waves of frequency f moves towards an observer with a velocity `v//3` and the observer moves away from the source with a velocity `v//4`, the apparent frequency as heard by the observer will be (`v=` velocity of sound)

A

`9f//8`

B

`8f//9`

C

`3f//4`

D

`4f//3`

Text Solution

Verified by Experts

The correct Answer is:
A

`n.=n((V-V_(0))/(V-V_(S)))=f((V-(V)/(4))/(V-(V)/(3)))=f(((3V)/(4))/((2V)/(3)))`
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