Determine em m3, o volume de um cubo cuja aresta mede 1cm.

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.

v=ir = 3x15 =45 v

area of focus

option number c is the right answer.