what is radius of carvature???
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The radius of curvature is the radius of a circle which touches a curve at a given point and has the same tangent and curvature at that point.
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The radius of curvature of a spherical mirror is the radius of the sphere of which the reflecting surface of spherical mirror is a part and is represented by r' Focal point : It is the distance between the pole P and the focus F and is represented by f.
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