Question

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

(1) 180°

(2) 0°

(3) Equal to angle of incidence

(4) 90°

Comments

Ray optics and optical instruments

Answer 1

Ans: (4) 90º

Sol: In TIR when angle of incidence is equal to critical angle,then angle of refraction is 90º.