Question

if the radius of curvature of spherical mirror is 20m. find it focal length​

Answer 1

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Radius of curvature (R) = 20 cm

Radius of curvature of a spherical mirror = 2 X Focal length (f)

R= 2f

f= R/2

f = 20 / 2

f = 10

Hence, the focal length of the given spherical mirror is 10 cm