Distance between optic center and center of curvature
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Radius of curvature: The distance between optical centre and centre of curvature is called the radius of curvature, which is generally denoted by R. Focal Length: The distance between optical centre and principal focus is called focal length of a lens. Focal length of a lens is half of the radius of curvature.
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Radius of curvature: The distance between optical centre and centre of curvature is called the radius of curvature, which is generally denoted by R. Focal Length: The distance between optical centre and principal focus is called focal length of a lens. Focal length of a lens is half of the radius of curvature.
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