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Question

What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror)? Calculate the focal length of a spherical mirror whose radius of curvature is 25 cm.

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Solution

The relation between the focal length and radius of curvature of a spherical mirror is as follows:
Radius of curvature = 2 x focal length
R = 2f
Given, the radius of curvature 'R' = 25 cm
Then, the focal length 'f' =252 = 12.5 cm

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