Question

what will happen if parallel rays of light passes through concave Lens, convex lens... Represent it by diagrams...

Answer 1

$\textbf{Answer is in Attachment !}$

Answer 2

A concave lens is thinner in the middle than it is at the edges. This causes parallel rays to diverge . They separate but appear to come from a principle focus on the other side of the lens. In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.