The radius of curvature of a spherical mirror is 80cm. What is its focal length ?
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Explanation:
Given-
Radius of curvature,
R = 80 cm
Radius of curvature of a spherical mirror
= > 2 x focal length(f)
=> R = 2f
=> f = R/2
=> f = 80/2
=> f = 40cm.
Hence, the focal length of the given spherical mirror is 40cm.
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