We have a 10kg ball and a 15kg ball. We drop them from the top of the science building while objects are at rest and there is no wind resistance. Which one hits the ground first?​

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.