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Question

Distance between focus and centre of curvature is equal to ___.

A
Half of radius of curvature
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B
Radius of curvature
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C
Height of the mirror
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D
Object distance
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Solution

The correct option is A Half of radius of curvature
Focus is the midpoint between the pole and the centre of curvature of a mirror or lens and the distance between pole and the centre of curvature is called the radius of curvature. So, the required distance is half of radius of curvature.

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