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A ray of light is incident at an angle 'i' on one face of a thin angled prism. The ray emerges normally from the other face. Refractive index of the glass prism is 'n' and angle of prism is ' A^ . The value of ' i ^ is

Options

  1. AAn ²
  2. B~A ² n
  3. CAn
  4. D1 An

Correct answer

C. An

Step-by-step solution

(A) For a prism A = r ₁+ r ₂ here r₂=0 A=r₁ Refractive index n = i r ₁ = i r ₁ = i A i = An

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