The radius of curvature of a spherical mirror is 20 cm.what is it's focal length ?
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Explanation:
Radius of curvature = 20 cm
Radius of curvature of a spherical mirror = 2 — Focal length
R= 2f
f= R/2
f = 20 / 2
f = 10
Hence, the focal length of the given spherical mirror is 10 cm
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