Question

When light passes from air into water, the frequency of the light remains the same.

Answer 1

We know that the frequency of the wave remains constant when the wave is travelling from one medium to another..



It is also known relation that:

. Velocity of the wave= frequency x wavelength

From here , we know that Velocity of wave changes and frequency doesn't. Hence the wavelength should change for the equation to be true . It is the change that causes refraction of light ...






As the wave is travelling from a rarer medium to the light denser medium.....


Velocity of the light decreases, frequency remains same and hence wavelength decreases........




Hope it will help you Dear............