Which statement is true of a convex lens? a. it is thicker at the edges and thinner at the center. b. it is thinner at the edges and thicker at the center. c. it is uniformly thick. d. it is uniformly thin.

The correct choice is

B.  

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

Explanation:

A convex lens has to converge the rays coming towards it at a single point. For that to be possible, the lens has to be thin at the edges for the bending of light to be smaller and must be thick at the center of the bending of light to be larger there.

a coal burning power plant

the area between the graph and the t axis