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Mirror Formula and Magnification

A virtual, er...

Question

A virtual, erect and magnified image of an object is produced by a concave mirror of focal length 12 cm. At what distance should this object be placed from the mirror?
(a) 10 cm
(b) 14 cm
(c) 18 cm
(d) 24 cm

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Solution

(a) 10 cm
In a concave mirror, a virtual and erect image is formed only if the object is placed within the focus.

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