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Question

If the object is placed at 60 cm beyond c of the concave mirror. Suddenly the object is moved towards the mirror till focus. What will happen to the magnitude of magnification?


  1. remains constant

  2. magnification reaches infinity

  3. decreases

  4. increases


Solution

The correct option is D

increases


As the object moves towards focus; the height of image increases. Since, magnification = (height of image)/(height of object).

So, when the height of image increases; magnitude of magnification also increases.

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