show that radius of curvature is double of the focal length of the spherical mirror
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radius of curvature=centre of curvature
r=c
r=2f
r=c
r=2f
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Focal length of a plane mirror is infinity. (A plane mirror can be considered as a spherical mirror of infinite radius of curvature. Focal length is half of radius of curvature and hence it is infinity.
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