Question

the radius of curvature of a spherical mirror is 20 cm. what is its focal length?​

Answer 1

Explanation:

focal length is always 2r

so it is 10cm

Answer 2

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The Radius of Curvature

$R = 20 \: cm$

The Focal Length is Given By

$F = \frac{R}{2} = \frac{20}{2}$

$= 10 \: cm$

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