Physics-
General
Easy

Question

A parallel beam of light falls on a convex lens. The path of the rays is shown in the figure. It follows that

  1. mu1 > mu2 > mu2    
  2. mu1 < mu2 < mu2    
  3. mu1 = mu2 < mu2    
  4. mu1 = mu2 > mu2    

The correct answer is: mu1 = mu2 < mu2


    Since the ray does not bend at the first face of the lens, that is, it is not refracted, mu1 =mu. When this ray meets the second face, it bends toward the normal to that face. Hence mu2 > mu

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