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  • Find the magnitude of the focal length of a concave mirror whose radius of curvature is 25 cm.

Find the magnitude of the focal length of a concave mirror whose radius of curvature is 25 cm.

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We know that focal length (f) is half of the radius of curvature.

So the magnitude of the focal length is given by  f=\frac{R}{2}=\frac{25}{2}=12.5 \ cm

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avinash.dongre

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