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(a) For which position of an object, a c...

(a) For which position of an object, a concave mirror forms a real image equal in size to the object ?
(b) State one use of a concave mirror.
(c) An object of height 1 cm is placed at a distance of 15 cm from a concave mirror of radius of curvature 20 cm. Find the postition, nature and size of the image formed.

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