question_answer 36)

A ray of light incident at an angle 9 on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5° and the prism is made of a material of refractive index 1-5, the angle of incidence is (a) 7.5°                                  (b)5° (c) 15°                                   (d) 2-5°

Answer:

  (a) Here, A -5, As the ray emerges from the other face of prism normally,                        As                                 From