Editing Circular polarization (section)

==In quantum mechanics==
{{further|Photon polarization}}
In the [[quantum mechanical]] view, light is composed of [[photons]]. Polarization is a manifestation of the [[spin angular momentum of light]]. More specifically, in quantum mechanics, the direction of spin of a photon is tied to the handedness of the circularly polarized light, and the spin of a beam of photons is similar to the spin of a beam of particles, such as electrons.<ref>Introduction to Quantum Theory 2ED David Park Sec 2.2 Pg32 "... the polarization of a beam of light is exactly the same kind of thing as the spin of a beam of electrons, the differences of terminology reflecting only the accidents of the historical order of discovery."</ref>