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What is spin in physics?
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What are the spins of elementary particles?
Spin is an intrinsic form of angular momentum carried by elementary particles, and thus by composite particles such as hadrons, atomic nuclei, and atoms. [1][2]: 183 –184 Spin is quantized, and accurate models for the interaction with spin require relativistic quantum mechanics or quantum field theory.
Oct 21, 1999 · "Spin is the total angular momentum, or intrinsic angular momentum, of a body. The spins of elementary particles are analogous to the spins of macroscopic bodies. In fact, the...
Feb 22, 2022 · Spin was a latecomer to the quantum mechanical party. Even after Schrödinger wrote his infamous equation and everything seemed to be working perfectly, nobody realized that spin existed. For the...
Oct 11, 2024 · spin, in physics, the amount of angular momentum associated with a subatomic particle or nucleus and measured in multiples of a unit called the Dirac h, or h-bar (ℏ), equal to the Planck constant divided by 2π. For electrons, neutrons, and protons, the multiple is 0.5; pions have zero spin.
- The Editors of Encyclopaedia Britannica
Spin is a fundamental characteristic of all particles, not just electrons, and is analogous to the intrinsic spin of extended bodies about their own axes, such as the daily rotation of Earth. Spin is quantized in the same manner as orbital angular momentum.
Spin. Until we have focussed on the quantum mechanics of particles which are “fea-tureless”, carrying no internal degrees of freedom. However, a relativistic formulation of quantum mechanics shows that particles can exhibit an intrin-sic angular momentum component known as spin.
Spin. It's more about a particle's identity than its merry-go-round motion. Quantum particles have a quirky property called spin, which, as it turns out, has almost nothing to do with things like a bicycle wheel or the Earth spinning around an axis.
