PhysicsAt what distance from the concave lens should a 3 cm tall object be placed so that the image is formed 15 cm from the concave lens? Assume the focal length of the lens is 20 cm.

At what distance from the concave lens should a 3 cm tall object be placed so that the image is formed 15 cm from the concave lens? Assume the focal length of the lens is 20 cm.


  1. A
    -20 cm
  2. B
    +40 cm
  3. C
    -60 cm
  4. D
    +80 cm 

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    Solution:

    The Correct Option is C i.e. -60 cm

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