Question

Distinguish between a convex lens and concave lens. Which of the two is a converging lens : convex lens of concave lens?

Answer 1

Sr. No.	Convex lens	Concave lens
1.	A convex lens converges or concentrates the light rays to a point.	A concave lens diverges the rays passing through it.
2.	A convex lens has a real focus.	A concave lens has a virtual focus.
3.	A convex lens has a positive focal length.	A concave lens has a negative focal length.

A convex lens is a converging lens.