JEE Advanced 2017 Physics question

For an isosceles prism of angle and refractive index , it is found that the angle of minimum deviation . Which of the following options is/are correct?

(A)For the angle of incidence , the ray inside the prism is parallel to the base of the prismCorrect
(B)For this prism, the refractive index and the angle of prism are related as
(C)At minimum deviation, the incident angle and the refracting angle at the first refracting surface are related by Correct
(D)For this prism, the emergent ray at the second surface will be tangential to the surface when the angle of incidence at the first surface is Correct

Answer: (A),(C),(D)

Solution

At minimum deviation and . (A) With the prism is at minimum deviation, and in an isosceles prism the ray then travels parallel to the base: true. (C) : true. (B) \frac{\sin A}{\sin(A/2)}\cos$ A2⇒

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Question ID VK-026598