What is the radius r of the turn if θ = 20. 0 ∘ (assuming the car continues in uniform circular motion around the turn)?.

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.

k2s for potassium sulphide