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Sound waves of wavelength lamda travell...

Sound waves of wavelength `lamda` travelling in a medium with a speed of v m/s enter into another medium where its speed is 2v m/s. Wavelength of sound waves in the second medium is

A

`lamda`

B

`(lamda)/(2)`

C

`2lamda`

D

`4lamda`

Text Solution

Verified by Experts

The correct Answer is:
C
We have ,` v = f lamda implies v prop lamda (because f =` constant)
`implies (v_(1))/( v_(2)) = (lamda _(1))/( lamda_(2)) implies (v)/( 2c) = (lamda)/( lamda_(2)) implies lamda_(2) = 2 lamda `
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