What is the power of a convex lens of focal length 0.5 m?

Given: 

Focal length, $f$ = $+$0.5 m

To find: ​​Power of a lens, $P$.

Solution:

We know that power of the lens is given by-

$Power\ (P)=\frac {1}{f}$

Substituting the given value we get-

 $P=\frac {1}{0.5}$

 $P=\frac {10}{5}$

 $P=+2D$

Hence, the power of the lens is 2 D.

Tutorialspoint

Updated on: 10-Oct-2022

984 Views

Kickstart Your Career

Get certified by completing the course

Get Started