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A train is moving at 30 m//s in still ai...

A train is moving at `30 m//s` in still air. The frequency of the locomotive whistle is `500 Hz` and the speed of sound is `345 m//s`. The apparent wavelengths of sound in front of and behind the locomotive are respectively

A

`0.63m`, `0.80m`

B

`0.63m`, `0.75m`

C

`0.60m`, `0.85m`

D

`0.60m`, `0.75m`

Text Solution

Verified by Experts

The correct Answer is:
B
As train approaches `lambda.=((V-V_(s))/(n))`
As train receeds. `lambda..=(V+V_(S))/(n)`
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