Скачать или смотреть What is Larmor precession?, Explain Larmor precession, Define Larmor precession

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~~~ Larmor precession ~~~

Title: What is Larmor precession?, Explain Larmor precession, Define Larmor precession
Created on: 2019-05-31
Source Link: https://en.wikipedia.org/wiki/Larmor_...

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Description: In physics, Larmor precession is the precession of the magnetic moment of an object about an external magnetic field. Objects with a magnetic moment also have angular momentum and effective internal electric current proportional to their angular momentum; these include electrons, protons, other fermions, many atomic and nuclear systems, as well as classical macroscopic systems. The external magnetic field exerts a torque on the magnetic moment, τ → = μ → × B → = γ J → × B → {\displaystyle {\vec {\tau }}={\vec {\mu }}\times {\vec {B}}=\gamma {\vec {J}}\times {\vec {B}}} ,where τ → {\displaystyle {\vec {\tau }}} is the torque, μ → {\displaystyle {\vec {\mu }}} is the magnetic dipole moment, J → {\displaystyle {\vec {J}}} is the angular momentum vector, B → {\displaystyle {\vec {B}}} is the external magnetic field, × {\displaystyle \times } symbolizes the cross product, and γ {\displaystyle \gamma } is the gyromagnetic ratio which gives the proportionality constant between the magnetic moment and the angular momentum. The phenomenon is similar to the precession of a tilted classical gyroscope in an external torque-exerting gravitational field.

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