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Question

# An object is kept on the principal axis of a concave mirror of focal length 10cm, at a distance of 15cm from its pole. The image formed by the mirror is?

A
Virtual and magnified
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B
Virtual and diminished
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C
Real and magnified
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D
Real and diminished
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Solution

## The correct option is D Real and magnifiedFocal length of concave mirror f=−10 cmObject distance u=−15 cmUsing 1v+1u=1f∴ 1v+1−15=1−10⟹ v=−30 cmSince v is negative, so image formed is real.Magnification m=−vu∴ m=−(−30)−15=−2Since m is greater than 1, so magnified image is formed.Correct answer is option C.

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