Question

State two differences between a convex and a concave lens.

Answer 1

	Convex lens	Concave lens
1.	A convex lens can form both real and virtual images	A concave lens always forms a virtual image
2.	It can form a magnified image.	The image is always diminished in size.

Answer 2

1) A convex lens is thicker in the middle, while a 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.