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AP EAMCET · PHYSICS · Ray Optics

A light ray incidents on an equilateral prism made of material of refractive index \(\sqrt{3}\). Inside the prism, if the light ray moves parallel to the base of the prism, then the angle of incidence of the light ray is

  1. A \(30^{\circ}\)
  2. B \(45^{\circ}\)
  3. C \(75^{\circ}\)
  4. D \(60^{\circ}\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(60^{\circ}\)

Step-by-step Solution

Detailed explanation

\(A = 60^{\circ}\) \(r_1 = A/2 = 60^{\circ}/2 = 30^{\circ}\) \(\sin i = n \sin r_1 = \sqrt{3} \sin 30^{\circ} = \sqrt{3}(1/2) = \sqrt{3}/2\) \(i = 60^{\circ}\)
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