Question

what is centre of curvature?​

Answer 1

$\mathfrak\color{palevioletred}{\underline{\underline{Centre\:of\:curvature:-}}}$

The centre of the two spheres of which the two surfaces of the given lens, are a part it is known as Centre of curvature.

Each of the two surfaces of a spherical lens can be regarded as a part of sphere.

Answer 2

Answer:

center of curvature :

the centre of the sphere coffee which the mirror is a part, is called the center of the mirror.