A sound waves passes from a medium `A` to a medium `B`. The velocity of sound in `B` is greater than in `A`. Assume that there is no absorption or reflection at the boundary . As the wave moves across the boundary :

Options

A. the frequency of sound will not change
B. the wavelength will increase
C. the wavelength will decrease
D. the intensity of sound will not change

Answer

A, B, D

Explanation

`v_(2) gt v_(1)` frequency does not change on changing the medium.
`lambda = (v)/(f)`
As velocity increases , so wavelength increase.
As there is no absorption or reflection of wave , so intensity remain same.