Which of the cars above are traveling at the same velocity? A) c and d

B) b, c,d and f

C) b, c and d

D) b and c

b,c,d,and f are the car traveling at the sane velocity

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

this is a good question! i'll do some research and come back when i have the answer!