Question

A certain prism produces a minimum deviation of \(42^\circ\). It produces a deviation of \(45^\circ\) when the angle of incidence is either \(43^\circ\) or \(62^\circ\). The angle of incidence when the prism undergoes minimum deviation is

• A. \(60^\circ\)
• B. \(30^\circ\)
• C. \(49^\circ\)
• D. \(51^\circ\)
• E. \(40^\circ\)

Hint:

For equal deviations in a prism, the two incidence angles are symmetric about the angle of minimum deviation.

Answer 1

The Correct Option is D