NEET Physics Ray Optics and Optical Instruments Questions Solved

NEET - 2010

A ray of light is incident on a 60° prism at the minimum deviation position. The angle of refraction at the first face (ie, incident face) of the prism is 

(a) zero                                             (b) 30°

(c) 45°                                               (d) 60°

The refracting angle of prism 

         A=r1+r2

For minimum deviation

                 r1=r2=r            A=2ror              r=A2=60°2=30°

Difficulty Level:

  • 12%
  • 56%
  • 21%
  • 13%
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