The focal length of a convex mirror is $10 c m$ . Its radius of curvature will be:

5 c m

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10 c m

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20 c m

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30 c m

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Solution

The correct option is D $20 c m$
The relation between focal length and Radius of curvature is,
$R = 2 f$
Here focal length is 10cm so,
$R = 2 \times 10 = 20 c m$

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