Physics-
General
Easy

Question

A ray of light incident normally on the horizontal face of the slab and just fail to emerge from the diagonal face of the prism. If prism angle 30° refractive index of the prism is

  1. square root of 2    
  2. 2    
  3. slightly greater than 2    
  4. slightly less than 2    

The correct answer is: square root of 2

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