Question

the radius of curvature of a spherical mirror is 20 cm what is its focal length
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Answer 1

focal length = radius of curvature÷ 2

= 10cm

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Answer 2

$\huge\fbox\red{Solution}$

Given,

➾ Radius of curvature (R) = 20 cm

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

Find :-

➾ R= 2f

➾ f= R/2

➾ f = 20 / 2

➾ f = 10

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

★ Hope you understand this concept mate :) ★