Question

power of a concave lens of focal length 2m is?

Answer 1

power = 1/focal length
power=0.5diopter..
Hope you understand

Answer 2

Hola mate !! ✨✨

here's your answer...⬇️⬇️

$p = \frac{1}{f}$

where P is power and F focal length.

$= \frac{1}{2}$

$= 0.5 \: D$

hope it helps !! ❤️❤️