Question

State two differences between a convex and a concave lens.
Topic: Light

Answer 1

Two differences are as follows :

1. Concave can diverge the rays of light falling on it, while convex can't.

2. Concave lens always forms a virtual image, while convex forms a real image.

Answer 2

"Convex lenses are thicker at the middle ie, they bulge out. Rays that pass through the lens come closer to each other.

A convex lens can simply be called a converging lens. It is also called “positive” lens.

Concave lenses are thinner at the middle ie they bulge in. Rays that pass through the lens spread away from each other.

A concave lens can simply be called a diverging lens. It is also called “negative” lens."