D. They would devise an experiment that could test the two scientists conclusion

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.

car a and b are moving in opposite directions

plz mark.me the brainliest i rlly need this kind of yours in exchange

do you have a formula possibly

i already answered it by 34/s