Which of the following relations is true for focal length (f) and the radius of curvature (r)?

f = 2r

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f = r/2

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f = r/2 + 1

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f = r + 2

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Solution

The correct option is B
f = r/2

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Which of the following relations is true for focal length (f) and the radius of curvature (r)?

The correct option is B f = r/2

The correct option is B
f = r/2