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Explain why the distance from mirror to object is the radius of curvature

Explain why the distance from mirror to object is the radius of curvature

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Answer #1

All spherical mirrors are a part of a glass sphere. The part of a glass sphere is cut and its one side is polished to form spherical mirrors (if inner side of the spherical mirror is polished then convex mirror is formed and if outer side of the spherical mirror is painted concave mirror is formed). The glass sphere would have a radius, this radius is called as the radius of curvature.

Radius of curvature of a spherical mirror is the radius of the glass sphere from which the mirror is taken as a part.

Radius of curvature is related to the focal length of the mirror as

Object distance is the distance of object from the mirror. Hence it is not nessecary that the onject distance must be same to the radius of curvature of the mirror.

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