Question

radius of curvature of a mirror is tiwce its _______length
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Answer 1

Answer:

The radius of curvature of mirror is twice its focal length

Explanation:

Answer 2

Answer:

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Explanation:

For spherical mirrors of small apertures, the radius of curvature is found to be equal to twice the focal length. We put this as R=2f. This implies that the principal focus of a spherical mirror lies midway between the pole and centre of curvature.