Define main focus of convex lens

Asked by malkeetranu748 | 15th Feb, 2020, 08:05: PM

Expert Answer:

The principal focus of convex lens is a point at which the light rays travelling parallel to principal axis converge after passing through the lens.
 
Convex lens have two focii at equal distance from optical centre of lens, each on either side of a lens  

Answered by Shiwani Sawant | 15th Feb, 2020, 11:56: PM