Typical configuration of an LCD screen and working principle of the prism film: ray I is totally reflected and recycled by diffuse reflection, ray II is converged by the prism refraction ...

eg a light ray changes direction when refracted by a lens. is the change in direction of a wave at a boundary. When light is refracted as it enters a prism, each colour is refracted by a different ...

A prism is a solid shape that has the same cross-section all the way through. These three shapes are prisms. The first has a circular cross-section. The second has a rectangular cross-section.