Question

(i) Find the power of concave lens of focal length 2 m..
(ii) Define principal focus of a concave mirror ...​

Answer 1

Answer:

i)P=1/f

P=1/2

P=0.5D

ii)Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.

Plz mark it BRAINLIEST

Answer 2

principle focus :-

it is point at which parallel incident ray meet after reflection

hope my answer helps you ☺