lohasydney.blogg.se

Magnitude of a vector fx 115
Magnitude of a vector fx 115











Spinors and bispinors behave similarly to vectors: they have definite magnitudes and change under rotations however, they use an unconventional "direction". Spin is described mathematically as a vector for some particles such as photons, and as spinors and bispinors for other particles such as electrons.

magnitude of a vector fx 115 magnitude of a vector fx 115

The existence of the electron spin can also be inferred theoretically from the spin–statistics theorem and from the Pauli exclusion principle-and vice versa, given the particular spin of the electron, one may derive the Pauli exclusion principle. The existence of electron spin angular momentum is inferred from experiments, such as the Stern–Gerlach experiment, in which silver atoms were observed to possess two possible discrete angular momenta despite having no orbital angular momentum. For photons, spin is the quantum-mechanical counterpart of the polarization of light for electrons, the spin has no classical counterpart. The orbital angular momentum operator is the quantum-mechanical counterpart to the classical angular momentum of orbital revolution and appears when there is periodic structure to its wavefunction as the angle varies. Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum. Spin is an intrinsic form of angular momentum carried by elementary particles, and thus by composite particles ( hadrons) and atomic nuclei.

magnitude of a vector fx 115

For rotation in classical mechanics, see Angular momentum. This article is about spin in quantum mechanics.













Magnitude of a vector fx 115