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

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

0.63 m, 0.80 m

B

0.63 m, 0.75 m

C

0.60 m, 0.85 m

D

0.60 m, 0.75 m

Text Solution

Verified by Experts

The correct Answer is:
B
`lamda '_1 = ((v - v _ s ) /(n)) `
` lamda '_2 = (( v + v _ s ) /( n)) `
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