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A vehical , with a horn of frequency n...

A vehical , with a horn of frequency n is moving with a velocity of 30 m/s in a direaction prependicualr to the estaright line joining the ovsercer and the vehicle. The observer perpenives the sound to have a frequency `n+n_(1)`. Then ( If the sound velcoity in air is 300m/s)

A

`n_1=0.1 n`

B

`n_1=0`

C

`n_1=10n `

D

`n_1=-0.1 n`

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The correct Answer is:
B
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