1
KCET 2019
MCQ (Single Correct Answer)
+1
-0

A certain prism is found to produce a minimum deviation of $$38^{\circ}$$. It produce a deviation of $$44^{\circ}$$ when the angle of incidence is either $$42^{\circ}$$ or $$62^{\circ}$$. What is the angle of incidence when it is undergoing minimum deviation?

A
$$30^{\circ}$$
B
$$40^{\circ}$$
C
$$49^{\circ}$$
D
$$60^{\circ}$$
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