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KVPY2013PhysicsRay Optics

A ray of light incident on a glass sphere (refractive index 3 ) suffers total internal reflection before emerging out exactly parallel to the incident ray. The angle of incidence was

Options

  1. A75^
  2. B30^
  3. C45^
  4. D60^

Correct answer

D. 60^

Step-by-step solution

array l i =2 r sini r = 3 2 r = 3 r=30^ & i =60^ array Note : But for r=30^ TIR cannot take place at B .

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