Question

centre of curvature
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Answer 1

Explanation:

center of the circle whose center lies on the concave side of a curve on the normal to a given point of the curve and whose radius is equal to the radius of curvature at that point

Answer 2

Answer:

Centre of curvature of a concave or a convex lens is the centre of the circle from which the mirror was cut from or the point we get when we draw the radius of the mirror