1.

When source and detector are stationary, but the wind is blowing at speed V_w, the apparent wavelength lambda^1 on the wind side is related to the actual wavelength lambda by (speed of sound is V):

Answer»

`LAMBDA^(1) = lambda`
`lambda^(1) = V_(W)/V lambda`
`lambda^(1) =(V_(W) + V)lambda/V`
`lambda^(1) = (V/(V-V_(W)))lambda`

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