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COMEDK2012PhysicsRay Optics

An equilateral prism is kept in the minimum deviation position. If the angle of incidence of a monochromatic ray at a refracting face is 49^ 30^ , then the angle of minimum deviation of the ray will be

Options

  1. A39^
  2. B49^ 30^
  3. C40^ 30^
  4. D51^

Correct answer

A. 39^

Step-by-step solution

Given, i=49^ 30^ , A=60^ (equilateral prism) At minimum deviation position, angle of deviation is D=2 i-A=2 (49^ 30^ )-60^ =99^ -60^ =39^

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