Question

What is principal focus of a convex lens? ​

Answer 1

Answer:

The principal focus of a convex lens is defined as the point on which the principal axis of the light is parallel to the principal axis that converges after the refraction from the lens. The principal focus of concave lens is when the light rays get diverged and appear to form a single point.

Answer 2

Answer:

The principal focus of a convex lens in defined as the point on which the principal axis of the light is parallel to the principal axis that converges after the refraction from the lens.The principal focus of concave lens is when the light rays get diverged and appear to form a single point.