Question

sound wave of wave length x travel from a medium in which velocity is vm/s into another medium in which if velocity is 3m/s is the wavelength of sound in the second medium

Answer 1

The wavelength in the second medium will be 3x/v

Explanation :

Whenever sound waves travel from one medium to another, then its velocity and wavelength changes but the frequency of the wave will always remain constant.

We know that frequency = velocity/wavelength

f₁ = f₂

=> v₁/λ₁ =  v₂/λ₂

=> v/x = 3/λ₂

=> λ₂ = 3x/v

Hence the wavelength in the second medium will be 3x/v