question_answer

A ray of light is incident at angle i on a surface of a prism of small angle A & emerges normally from the opposite surface. If the refractive index of the material of the prism is \[\mu \], the angle of incidence i is nearly equal to:

A) \[A/\mu \]                         

B) \[A/(2\mu )\]

C) \[\mu A\]                                           

D) \[\mu A/2\]