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A vehicle , with a horn of frequency n i...

A vehicle , with a horn of frequency `n` is moving with a velocity of `30 m//s` in a direction perpendicular to the straight line joining the observer and the vehicle . The observer perceives the sound to have a frequency `(n + n_(1))` . If the sound velocity in air is `330 m//s` , then

A

`n_1=10n`

B

`n_1=-n`

C

`n_1=0.1n`

D

`n_1=0`

Text Solution

Verified by Experts

The correct Answer is:
D
No doppler effect, because velocity is perpendicular to line joining vehicle and observer.
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