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AP EAMCET2001PhysicsRay Optics

One face of the glass prism is silver polished. A light ray falls at an angle of 45^ on the other face. After reflection it is subsequently reflected from the silvered face and then retraces its path. The refracting angle of prism is 30^ . The refractive index of the prism is

Options

  1. A3 2
  2. B2
  3. C3 2
  4. D3

Correct answer

D. 3

Step-by-step solution

r=90^ - [180^ - (90^ +30^ ) ] aligned & =90^ - [180^ -120^ ] & =90^ -60^ & =30^ i & =45^ & = i r = 45^ 30^ & = 1 2 1 2 = 2 aligned

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