Question

relation bw radius of culvature and focus​

Answer 1

Answer:

The focal length (f) of a lens is the distance between the center of the lens and the point at which the reflected light, of a beam of light travelling parallel to the center line, meets the center line (principal axis). The radius of curvature (r) is the radius of the lens that forms a complete sphere

Answer 2

Explanation:

focal length equals to half into radius of curvature