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Question

A medium (M) having refractive index 2 is placed in air. Its pole is at origin. A point object at (-10 cm,0) starts moving towards the surface with velocity 4 square root of 2 text end text m s to the power of negative 1 end exponent at 45° with principal axis. [R=20 cm]

Velocity of image along ' x ' direction is ___________ ms–1

  1. 4    
  2. 8    
  3. 16    
  4. 32    

The correct answer is: 32

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