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The speed of sound in air and water is 3...

The speed of sound in air and water is 340 m/s and 1420 m/s respectively. If sound waves have a wavelength of 2m in air, then the frequency of the same sound waves in water will be

A

100 Hz

B

125 Hz

C

340 Hz

D

170 Hz

Text Solution

Verified by Experts

The correct Answer is:
D
`(lamda_(m))/(lamda_(a)) = (v_(m))/(v_(a)) = (1420)/(340)`
`lamda_(m) = (142)/(34) xx lamda_(a) = (142)/(34) xx 2 = (142)/(17)`
`v_(m) = n lamda_(m) " " :. n = (v_(m))/(lamda_(m)) = (1420)/(142) xx 17`
`n = 170 Hz`
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