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

As we know that in transmission ofa wave from one medium to another frequency ofwave always remain same so with increase in speed wavelength increases. As there is no absorption or reflection ofwave at the boundary, it means full wave energy is transmitted hence intensity remain same.