REFLECTION of the Rays of Light, in Catoptrics, is their return, after approaching so near the surface of bodies as to be thereby repelled or driven backwards. For the causes of reflection, see OPTICS Index, at Rays of Light, and Reflection of Light, &c. For the application of the doctrine of reflection to mirrors, see OPTICS. See also MIRROR, BURNING-Glass, and GLASS-GRINDING; and for the coating or foliating of mirrors, see the article FOLIATING of Looking-glasses, &c. See also TELESCOPE.