Question

If critical angle of a material to air is 30 degree then refractive index of material will be

Answer 1

Answer:

2

Explanation:

The critical angle is defined as the angle of incidence where the angle of refraction is 90°

Thus,  the light must travel from an optically more dense medium to a less dense medium.

The critical angle s related to the refractive index as  -

θc=sin−1(n2/n1)

n=sin90/sin ic

= 1/sin30

=1 / 1/2

n=2

Thus, the refractive index of material will be 2