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General
Easy

Question

A convex mirror of focal length 10an is shown in the figure. A linear object AB=5 cm is placed along the optic axis. Point A is at a distance of 25 cm from the pole of mirror. The length of image of AB is

  1. 2.5 cm    
  2. 0.36 cm    
  3. 0.64 cm    
  4. 0.75 cm    

The correct answer is: 0.36 cm

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