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Define the radius of curvature of a sphe...

Define the radius of curvature of a spherical mirror. Find the nature and focal length of a spherical mirror whose radius of curvature is 24 cm.

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The radius of the sphere from which the mirror is made is called the Radius of curvature [r] of the spherical mirror. The radius of curvature is a line joining any point on the reflecting surface of the mirror to the centre of the mirror [C].
r = 2 [focal length of the spherical mirror]
`r=+24 cm = 2f " " f=+12 cm`
The spherical mirror is a convex mirror.
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