Question

What is center of curvature?

Answer 1

the centre of the curve of spherical mirror is called centre of curvature

Answer 2

In geometry, the center of curvature of a curve is found at a point that is at a distance from the curve equal to the radius of curvature lying on the normal vector. It is the point at infinity if the curvature is zero. The osculating circle to the curve is centered at the centre of curvature.