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- He introduced the second quantum number, azimuthal quantum number, and the third quantum number, magnetic quantum number. He also introduced the fine-structure constant and pioneered X-ray wave theory.
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Arnold Johannes Wilhelm Sommerfeld, ForMemRS [1] (German: [ˈzɔmɐˌfɛlt]; 5 December 1868 – 26 April 1951) was a German theoretical physicist who pioneered developments in atomic and quantum physics, and also educated and mentored many students for the new era of theoretical physics.
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As professor of theoretical physics at Munich (1906–31), he did his most important work. His investigations of atomic spectra led him to suggest that, in the Bohr model of the atom , the electrons move in elliptical orbits as well as circular ones.
- The Editors of Encyclopaedia Britannica
Sep 28, 2016 · Arnold Sommerfeld. In 1916, a theoretical physicist in Munich – Germany, Arnold Sommerfeld helped to visualize the atom in a slightly different way. which would explain the doublets and triplets, which were observed experimentally.
Nov 16, 2023 · Sommerfeld's most notable contribution to theoretical physics is evident in his development and expansion of quantum theory. Working on the foundations laid down by Niels Bohr, Sommerfeld introduced elliptical and asymmetric orbits into the atomic model, significantly improving the accuracy of spectral predictions.
The Bohr–Sommerfeld model (also known as the Sommerfeld model or Bohr–Sommerfeld theory) was an extension of the Bohr model to allow elliptical orbits of electrons around an atomic nucleus. Bohr–Sommerfeld theory is named after Danish physicist Niels Bohr and German physicist Arnold Sommerfeld.
