In total internal reflection when the angle of incidence is equal to the critical angle for the pair of medium in contact, what will be angle of refraction? In total internal reflection when the angle of incidence is equal to the critical angle for the pair of medium in contact, what will be angle of refraction? In total internal reflection when the angle of incidence is equal to the critical angle for the pair of medium in contact, what will be angle of refraction?

Options

A. `90^(@)`
B. `180^(@)`
C. `0^(@)`
D. equal to angle of incidence

Answer

A

Explanation

When angle of incidence is equal to critical angle then angle of refraction must be `90^(@)`.