Question:
A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5o and the prism is made of a material of refractive index 1.5, the angle of incidence is
(a) 7.5o
(b) 5o
(c) 15o
(d) 2.5o
Solution:
(a) 7.5o