Question

A ray incident at an angle 53° on a prism emerges at an angle at 37° as shown. If the angle of incidence is made 50°, which of the following is a possible value of the angle of emergence. 

(a) 35°

(b) 42°

(c) 40°

(d) 38°

Answer 1

Correct option: (d) 38°

Explanation: 

Graph between angle of incidence and deviation is un-symmetrical with respect to angle of incidence and slope decreases after minimum deviation. Keeping above facts in mind option (D) is correct choice.