Question

When light enters from air to water, then its

A) frequency increases and speed decreases B) frequency is same but the wavelength is smaller in water than in air
C) frequency is same but the wavelength is larger in water than in air D) frequency and speed both decreases

Answer 1

Solution :

we know that

frequency being a characteristic of source of light does not change with change of medium.

refrative index is inversely proportional to wavelength .

therefore the correct option is b ) frequency is same but the wavelength is smaller in water than in air.

I hope it helps you!