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Question

When source and detector are stationary but the wind is blowing at speed , the apparent wavelength λ on the wind side is related to actual wavelength λ by [take speed of sound in air as v]

A
λ=λ
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B
λ=vwvλ
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C
λ=vw+vvλ
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D
λ=vvvwλ
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Solution

The correct option is C λ=vw+vvλ
λ=Wave speed relative to listenerfλ=v+vωf=v+vωfλ

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