A prism can be used to break light up into its constituent spectral colors (the colors of the rainbow). Prisms can also be used to reflect light, or to split light into components with different polarizations.

Right Angle Prisms can bend light at either 90-Deg or 180-Deg and can be used for retro-reflectors, telescopes, and mirror substitutes etc. The right angle surfaces of the prism may come with anti reflection coating at different wavelength.

The hypotenus surfaces of the right angle prisms are aluminum coated with protection paint coating.