Question

if all the rays
falling on a convex lens are parallel to the principal axis of the lens what happens to them after they passed through the lens

Answer 1

The ans. is given in above fig.

Answer 2

Answer:

If a beam of light rays parallel to the principal axis falls on a convex lens, the rays converge to a point known as the focal point of the lens.

OR

The parallel beam of light converges at a point situated equal to the focal length.

HOPE! IT'S HELPFUL.......