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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.
Apr 22, 2024 · Arnold Sommerfeld was a German physicist whose atomic model permitted the explanation of fine-structure spectral lines. After studying mathematics and science at Königsberg University, Sommerfeld became an assistant at the University of Göttingen and then taught mathematics at Clausthal (1897) and.
- The Editors of Encyclopaedia Britannica
He became one of the founders of quantum mechanics; some of his contributions included co-discovery of the Sommerfeld–Wilson quantization rules (1915), a generalization of Bohr's atomic model, introduction of the Sommerfeld fine-structure constant (1916), co-discovery with Walther Kossel of the Sommerfeld–Kossel displacement law (1919), and ...
Nov 16, 2023 · Sommerfeld's atomic model, developed in the early 20th century, expanded on Bohr's model by introducing significant modifications to the description of the structure of atoms. Arnold Sommerfeld incorporated elliptical and asymmetric orbits for electrons, in contrast to Bohr's circular orbits.
Abstract. With A. Sommerfeld’s extension of the Bohr theory in 1915–1916, it was turned into a powerful tool of atomic research and adopted and further developed by German physicists in particular. The new and more general Bohr–Sommerfeld theory described the atom in terms of two quantum numbers, while Bohr had originally used only one ...
Jan 30, 2014 · Abstract. Sommerfeld’s extension of Bohr’s atomic model was motivated by the quest for a theory of the Zeeman and Stark effects. The crucial idea was that a spectral line is made up of coinciding frequencies which are decomposed in an applied field. In October 1914 Johannes Stark had published the results of his experimental investigation ...
Dec 16, 2020 · Arnold Sommerfeld extended Niels Bohr’s quantum model of the atom in order to explain the splitting of spectral lines in magnetic (Zeeman effect) and electric fields (Stark effect).
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