Physics-
General
Easy

Question

A transparent solid cylindrical rod has a refractive index of 2 divided by square root of 3. It is surrounded by air. A light ray is incident at the midpoint of one end of the rod as shown in the figure The incident angle theta for which the light ray grazes along the wall of the rod is

  1. s i n to the power of negative 1 end exponent invisible function application open parentheses fraction numerator square root of 3 over denominator 2 end fraction close parentheses    
  2. s i n to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 2 over denominator square root of 3 end fraction close parentheses    
  3. s i n to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator square root of 3 end fraction close parentheses    
  4. s i n to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator 2 end fraction close parentheses    

The correct answer is: s i n to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator square root of 3 end fraction close parentheses

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