| 单词 | Paschen-Back effect |
| 释义 | Paschen-Back effect An effect on atomic line spectra that occurs when the atoms are placed in a strong magnetic field. Spectral lines that give the anomalous Zeeman effect when the atoms are placed in a weaker magnetic field have a splitting pattern in a very strong magnetic field. The Paschen-Back effect is named after the German physicists Louis Carl Heinrich Friedrich Paschen (1865–1947) and Ernest E. A. Back (1881–1959), who discovered it in 1912. In the quantum theory of atoms the Paschen-Back effect is explained by the fact that the energies of precession of the electron orbital angular momentum l and the electron spin angular momentum s about the direction of the magnetic field H are greater than the energies of coupling between l and s. In the Paschen-Back effect the orbital magnetic moment and the spin magnetic moment precess independently about the direction of H |
| 随便看 |
|
物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。