Physics-
General
Easy

Question

A paraxial beam of light is converging towards a point P on the screen. A plane parallel sheet of glass of thickness t and refractive index m is introduced in the path of beam. The convergence point is shifted by :

  1. t (1 – 1/mu) away    
  2. t (1 + 1/mu) away    
  3. t (1 – 1/mu) nearer    
  4. t (1 + 1/mu) nearer    

The correct answer is: t (1 – 1/mu) away

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