Circularly polarized beam carries the double angular momentum

摘要: It is shown that there are two different types of angular momentum electromagnetic radiation: 1) Spin; an elliptic polarization causes the spin density in any point (without a moment arm). 2) Moment linear momentum; it orbital momentum. A circularly polarized light beam with plane phase front and radiation from rotating dipole carry momenta both types, contrary to standard electrodynamics, these spatially separated. Thus splits into unambiguously.