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The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror? -

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प्रश्न

The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?

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उत्तर

f = `"R"/2`
R = 18 cm
f = `18/2` = 9 cm.

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