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Question

Light is incident normally in face AB of a prism as shown in figure A liquid of refractive index m is placed on face AC of the prism The prism is made of glass of refractive index 3/2 The limits of m for which total internal reflection takes place on face AC is

  1. mu greater than fraction numerator square root of 3 over denominator 2 end fraction    
  2. mu less than fraction numerator 3 square root of 3 over denominator 4 end fraction    
  3. mu greater than square root of 3    
  4. mu greater than fraction numerator square root of 3 over denominator 2 end fraction    

The correct answer is: mu less than fraction numerator 3 square root of 3 over denominator 4 end fraction

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