Question

WHAT IS MENT BY RADIUS OF CURVATURE

Answer 1

Answer:

In differential geometry, the radius of curvature, R, is the reciprocal of the curvature. For a curve, it equals the radius of the circular arc which best approximates the curve at that point. For surfaces, the radius of curvature is the radius of a circle that best fits a normal section or combinations thereof.

Answer 2

Answer:

The rardius of Cuvature =2×focal lenght

means the curved mirrors made from the sphere so th radius of the sphere is the radius of the curvature

and its is also twice as the focal length