Question

What is the difference between concave lens and convex lens

Answer 1

Rays of light that pass through the lens are spread out (they diverge). A concave lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus.

Answer 2

$\textbf{Concave lens }$:

• It is thinner at the edges and thicker in the middle.
• It is a converging lens
• It mostly forms real images

$\textbf{Concave lens }$:

• It is thinner in the middle and thicker at the edges.
• It is a diverging lens.
• It always forms virtual images.