Question

difference between concave and convex lens

Answer 1

Differences are :

i) Convex lens are thicker at the middle than at the edges; whereas concave lens are thinner in middle than at edges.

ii) Convex lens converge light rays; whereas concave lens diverge light rays.

iii) Convex lens form virtual, erect & magnified image; whereas concave lens form virtual, erect & diminished image.

Answer 2

Convex-
*also called converging lens
*thick

Concave-
*diverging lens
*thin