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The radius of curvature of a spherical m...

The radius of curvature of a spherical mirror is 20cm.What is its focal length?

Text Solution

Verified by Experts

We know that
R = 2f
Here , r = 20 cm .
` :. " " f = 20/2 = 10 ` cm
Focal length of concave mirror = 10 cm
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