The curvature of an convex lens is change by?

The curvature of a convex lens can be changed by changing the radius of curvature of its surfaces. The radius of curvature is the distance from the center of curvature to the surface of the lens. When the radius of curvature is increased, the lens becomes less curved and its focal length increases. When the radius of curvature is decreased, the lens becomes more curved and its focal length decreases.

The curvature of a convex lens can be changed by grinding or polishing the lens surfaces. This can be done by hand or by using a machine. The process of changing the curvature of a lens is called lens shaping.

Lens shaping is a critical step in the manufacture of optical lenses. The curvature of the lens must be precisely controlled in order to achieve the desired focal length and optical performance.