Question

The radius of curvature of concave lens is 20cm. Give its focal length​

Answer 1

Answer:

focal length = 21 × radius of curvature = 21×20 cm = 10 cm.

Explanation:

If you find the focal length of the convex mirror formed by the cornea, then you know its radius of curvature (it's twice the focal length). The object distance is do=12cm and the magnification is m=0.032.

Hope it will help you.....