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Question

If 'R' is the radius of curvature of a spherical mirror and 'F' is the focal length of that mirror, then which of the following is true?

A
R=F2
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B
F=R2
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C
F=R
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D
F=R3
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Solution

The correct option is B F=R2
The focal point occurs at the midpoint between pole and radius of curvature. So, if radius of curvature is R and focus is F, then, F=R2.

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