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A source of sound produces waves of wave...

A source of sound produces waves of wavelength 60 cm when it is stationary if the speed of sound in air is `320(m)/(s)` and source moves with speed `20(m)/(s)`, the wavelength of sound in the forward direction will be nearest to

A

56 cm

B

60 cm

C

64 cm

D

68 cm

Text Solution

Verified by Experts

The correct Answer is:
A
`lamda'=((v-v_S)/(v))lamda=((320-20)/(320))60`
`=56.25cm`
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