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" I.The radius of curvature of a spheric...

" I.The radius of curvature of a spherical mirror is "20cm" .What is its focal length? "

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The radius of curvature of a spherical mirror is 20 cm. What is its focal length ?

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?