To bend sharply and abruptly back; to break off.
To break the natural course of, as rays of light orr heat, when passing from one transparent medium to another of different density; to cause to deviate from a direct course by an action distinct from reflection; as, a dense medium refrcts the rays of light as they pass into it from a rare medium.
When light bends at an interface between two transparent materials. We find many things in our everyday experience refracting light: glass, water, air, plastic. The illusion of a broken leg dangling in the pool is due to the refraction of light. See also index of refraction refractive index See index of refraction