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 the angle of refraction is equal to `90^(@)`, the angle of incidence is called the critical angle.