Question

30. With regard to refraction which of the following
statement is false?
(a) It is a change in direction of light when it
passes from one transparent medium into
another of different optical density.
(b) Light is deviated away from the normal
when it enters an optically dense medium
from a less dense medium.
(c) The velocity of light is changed during
refraction.
(d) The wavelength of the light is changed
during refraction.​

Answer 1

Explanation:

optionB is false.

Explanation. when light enters rarer medium to denser medium it deviate towards normal.

Answer 2

The Correct Answer is:- b) Light deviates away from the normal when it enters an optically dense medium

When the light enters in an optically dense medium from a less dense medium it bends towards the normal.

Refraction of Light:-

• When light passes from one medium to another medium of different optical density or refractive index, it bends and this bending of light at the boundary separating two media is called Refraction of light.
• Due to the different refractive index of the medium, the light changes its direction.
• When the light passes through an optically rarer medium to an optically denser medium it bends towards the normal.
• When the light passes through an optically denser medium to an optically rarer medium it moves away from the normal.
• The velocity of light is changed during Refraction because when the light moves to a denser medium its velocity decreases.
• The wavelength of the light is changed during refraction.

So, The Correct Answer is:- b) Light deviates away from the normal when it enters an optically dense medium from a less dense medium.