Question

The Focal length of a lens is 40 cm find its radius of curvature.with step by step​

Answer 1

Answer:

Since the focal length is half the length of the radius of curvature. The focal length comes out to be 20 cm

______________________

Answer 2

Explanation:

$\bf \underline{AnswEr:-}$

Formula Used:-

$\huge \boxed{ \mathfrak{ \blue{R = 2f }}}$

Given:-

• Focal length= 40 cm

now,

$\longmapsto \sf \red{R = 2 \times 40}$

$\longmapsto \sf \red{R =80 \: \: cm}$