Question

what will be the change in the focal length if the radius of curvature is doubled ???


tell according to 2 mark question​

Answer 1

We know that,

f = R/2

So after doubling the curvature..

f = R

ratio = R/2 / R

ratio = 1/2

ratio = 1 : 2

So the focal length will also double.

Answer 2

Answer:

The focal length will be doubled