Question

Distinguish between concave and convex lens.

Answer 1

Convex lens	Concave lens
1. A convex lens is thicker in the middle and thinner at its edges.	1. A concave lens is thicker at the edges and thinner in the middle
2. A light beam converges on passing through a convex lens.	2. A light beam diverges on passing through a concave lens.
3. The convex lens produces a real image that is inverted and is smaller and can be obtained on screen.	3. A concave lens always forms a virtuall image, the image is magnified and cannot be obtaiined on screen.