State two differences between a convex and a concave lens.
1) Convex lens is thicker in the middle while concave lens is thinner in the middle.
2) A convex lens converges the light ray falling on it, while a concave lens diverges the light ray falling on it.
|Convex lens||Concave lens|
|Convex lens can form both real and virtual images||Concave lens always forms a virtual image|
|It can form magnified image.||Image is always diminished in size.|