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A convex mirror forms an image one-fourt...

A convex mirror forms an image one-fourth the size of the object. If object is at a distance of 0.5 m from the mirror the focal length of the mirror is

A

0.17m

B

`-1.5m`

C

`0.4m`

D

`-0.4m`

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The correct Answer is:
A
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