i. Refractive index depends on the………….of light. ii. The change in…………of light rays while going from one medium

Question

Fill in the blanks and explain the completed statement:

i. Refractive index depends on the………….of light.

ii. The change in…………of light rays while going from one medium to another is called refraction.

Answer 1

i. Refractive index depends on the velocity of light. 

It is an experimental fact.

ii. The change in the direction of propagation of light rays while going from one medium to another is called refraction. This is definition of refraction. It is assumed that the ray of light passes obliquely from one medium to another.