![]() In practice, spin is given as a spin quantum number by dividing the spin angular momentum by the ħ, which has the same units of angular momentum, although this is not the full computation of this value. All elementary particles of a given kind have the same magnitude of spin angular momentum, which is indicated by assigning the particle a.The of spin is the or (m 2s −1), just as with classical angular momentum. The existence of spin angular momentum is from experiments, such as the, in which silver atoms were observed to possess two possible discrete angular momenta despite having no orbital angular momentum.In some ways, spin is like a quantity it has a definite magnitude, and it has a 'direction' (but makes this 'direction' different from the direction of an ordinary vector). ![]() The orbital is the quantum-mechanical counterpart to the classical angular momentum of and appears when there is periodic structure to its wavefunction as the angle varies. In and, spin is an form of carried by, composite particles, and.Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum.
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