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 spin of a...

Nov 22, 2022 · Naturally, physicists call this behavior “spin.” But despite appearances, electrons don't spin. They can't spin; proving that it's impossible for electrons to be spinning is a standard homework...

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...

Mar 8, 2025 · 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 …

The name "spin" derives from an early and quite reasonable explanation for an unusual observation: Quantum particles, such as electrons, behave like miniature magnets. At the time, physicists knew that the motion of electrically charged …

Mar 26, 2025 · 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.

Oct 29, 2011 · Physicist: “Spin” or sometimes “nuclear spin” or “intrinsic spin” is the quantum version of angular momentum. Unlike regular angular momentum, spin has nothing to do with actual spinning. Normally angular momentum takes the form of an object’s tendency to continue rotating at a particular rate.

May 27, 2024 · Spin is a fundamental concept in quantum mechanics, representing an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei. Unlike classical angular momentum, spin is a purely quantum mechanical phenomenon that cannot be visualized in classical terms.

In physics, spin is the constant rotation of an object. For large visible objects like the Earth, spin is the angular momentum of the turning of the Earth around its axis. This tells the amount of rotation that it has. Angular momentum changes with the mass …