Question

if the power of the lens is +2D what is its radius of curvature

Answer 1

Explanation:

focal length is reciprocal of power

f = 1/2= 0.5m

it is positive ,hence this lens is a converging lens.

f = R/[2(n-1)]

0.5 = R/(2x 0.5)

R = 0.5 X 0.5 X 2=0.25 X 2 =0.5