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Question

# A boy of height 1m stands in front of a convex mirror. His distance from the mirror is equal its focal length. The height of his image is

A

0.25m

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B

0.5m

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C

0.33m

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D

0.67m

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Solution

## The correct option is B 0.5musing mirror formula: 1v+1−f=1fV=f2 where 'v' is the image distance, 'u' is the object distance and 'f' is the focal length of the mirror 1v+1−f=1fV=f2 We write magnification as vih0=−vu wherehi is the height of image and ho is the height of object. Placing the value of v, we can get hi=12

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