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Size of image of an object formed by a mirror having a focal length of 20cm,

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asked Jan 20, 2018 in Physics by Kundan kumar (49,132 points) ● 34 ● 439 ● 1387

Size of image of an object formed by a mirror having a focal length of 20cm, is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?

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answered Jan 20, 2018 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 26
selected Jan 20, 2018 by Kundan kumar
 
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An image smaller in size can be formed both by a concave mirror as well as a convex mirror.
Case 1: When mirror is concave, the image is real.

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