How does a concave lens differ from a convex lens? a) a convex lens is another way to describe a plane mirror; a concave lens is curved. b) a concave lens us curved inward on both sides; a convex lens is curved on only one side. c) a convex lens has a thick center and thin edges; a concave lens has a thin center and thicker edges. d) a convex lens has a thin center and thick edges; a concave lens has a thick center and thiner edges.

Answer;

C) A convex lens has a thick center and thin edges; a concave lens has a thin center and thicker edges.

Explanation;Convex lens refers to the lens which merges the light rays at a particular point, that travels through it, while a concave lens can be identified as the lens which disperses the light rays around, that hits the lenses.A convex lens is thicker at the center, as compared to its edges, while a concave lens is thinner at the center as compared to its edges.A concave lens is thicker at the edges than in the middle and spreads light rays apart producing an image smaller than the actual object. A convex lens on the other hand, is thinner at the edges and thicker towards the center, that is they are bent towards a central point.

The answer is a) carbon-12