Question

what is focus of mirror (concave)

Answer 1

Hii...

When light Rays parallel to the principal axis incident on the concave mirror , the light rays reflect and passes through a point on the principal axis . This point is known as FOCUS .

____________________


hope this helps !

Answer 2

Light rays that are parallel to principal axis of a concave mirror converge at a point on principal axis after being reflected by mirror. This point is know as focus of concave mirror.

Hope it helps you.