Question

Differences between concave and convex lenses

Answer 1

concave
1)diverging lenses.
2)thin at the center and thick at the periphery.
3)always form a virtual image.
convex
1)converging lenses.
2)thick at the center thin at the periphery.
3) the image is real but becomes virtual when the lens is brought close.

Answer 2

$\textbf{Convex Lens }$:

It is thinner at the edges and thicker at the middle.

It is a converging lens.

It mostly forms real image.

$\textbf{Concave Lens }$:

It is thinner in the middle and thicker at the edges.

It is a diverging lens.

It always forms virtual images.