Physics-
General
Easy

Question

A plane mirror of length 8 cm is moving with speed 3 m/s towards a wall in situation as shown in figure.A source of light S gives narrow and parallel light on to the mirror, then the speed of light spot formed on the wall is.

  1. 8 m/sec    
  2. 6 m/sec    
  3. zero    
  4. 16 m/sec    

The correct answer is: zero

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