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Currently Playing: Quantum theory of the Zeeman effect

Buy me a coffee and support the channel: https://ko-fi.com/jkzero [Members only] Supplementary Notes with all the equations and extra content https://ko-fi.com/jkzero/shop Become a member and get access to the Supplementary Notes with all the equations and extra content https://ko-fi.com/jkzero/tiers In this video I present the solution to the normal Zeeman effect using old-quantum theory published simultaneously by Arnold Sommerfeld and Peter Debye in Oct. 1916. After the fine structure and the Stark effect, this was the third (partial) success of Sommerfeld's quantization method. Unfortunately, the anomalous Zeeman effect remained a mystery for many more years. [Related videos] ∘ Quantum Theory of the Stark effect https://youtu.be/OvQMIif3ty0 ∘ Sommerfeld and the fine-structure constant https://youtu.be/H4ZnVpiQTDw ∘ Discovery of the Stark effect https://youtu.be/CQ1kgzCXDe8 ∘ Discovery of the Anomalous Zeeman effect https://youtu.be/a-hga-X9aKo ∘ Discovery of the Zeeman effect https://youtu.be/dM5xWIsNbR4 ∘ The Stern-Gerlach experiment https://youtu.be/BDAzFIJu9_E ∘ Playlist video series on Quantum Physics https://www.youtube.com/playlist?list=PL_UV-wQj1lvVxch-RPQIUOHX88eeNGzVH ∘ Playlist Classical Physics for Quantum Mechanics https://www.youtube.com/playlist?list=PL_UV-wQj1lvX-6uNvdvOHOopu4WZ_dE5w [References] [1] G.N. Lewis and F.H. Spedding, "A Spectroscopic Search for H3 in Concentrated H2," Phys. Rev. 43, 964 (1933) [2] P. Zeeman, "Researches in magneto-optics, with special reference to the magnetic resolution of spectrum lines," London, Macmillan (1913) [3] J. Stark and H. Kirschbaum, "Beobachtungen über den Effekt des elektrischen Feldes auf Spektrallinien. III. Abhängigkeit von der Feldstärke," Ann. Phys. 348: 991-1016 (1914) [4] F. Paschen, Bohrs Heliumlinien, Ann. Phys. 50, 901 (1916) [5] A. Sommerfeld, "Zur Theorie des Zeemans-Effekts der Wasserstofflinien, mit einem Anhang über den Stark-Effekt," Phys. Z. 17, 491 (1916) [6] P. Debye, "Quantenhypothese und Zeeman-Effekt," Phys. Z. 17, 507 (1916) [7] P. S. Epstein "Zur Theorie des Starkeffekts," Ann. Phys. 50, 489-521 (1916) [8] A. Rubinowicz, "Bohrsche Frequenzbedingung und Erhaltung des Impulsmomentes, Teil I" Phys. Z. 19, 441-445 (1918) [9] A. Rubinowicz, "Bohrsche Frequenzbedingung und Erhaltung des Impulsmomentes, Teil II" Phys. Z. 19, 465-474 (1918) [10] T. Preston, "Radiation phenomena in a strong magnetic field," Sc. Trans. R. Dub. Soc. 6, 385 (1898) [11] A. Sommerfeld, A. Ein Zahlenmysterium in der Theorie des Zeemaneffektes. Naturwissenschaften 8, 61–64 (1920) [12] A. Sommerfeld, "Allgemeine spektroskopische Gesetze insbesondere ein magnetooptischer Zerlegungssatz," Ann. Phys. 63, 221 (1920) [Credits] Arnold Sommerfeld by AIP Friedrich Paschen, public domain Paul S. Epstein, public domain Karl Schwarzschild, public domain Peter Debye, public domain Pieter Zeeman, public domain Johannes Stark, public domain Magnetic dipole moment current by Universaldenker under CC BY 4.0 Documentary "Gespleten Licht" University of Amsterdam (1996) https://www.youtube.com/watch?v=aGpFiHcqiH4 s- and p-orbitals by J. Cueto under CC BY-SA 4.0 Niels Bohr by AIP Wojciech Rubinowicz, public domain Albert Einstein, public domain Arnold Sommerfeld reading at a large table by AIP Erwin Schrödinger, public domain Orbitals-chart-by-quantum-number by MikeRun under CC BY-SA 4.0 Alfred Landé by AIP Wolfgang Pauli by AIP Werner Heisenberg by AIP Inception Spin Top by Ramsaur Films AIP: American Institute of Physics, Emilio Segrè Visual Archives CC BY 4.0: https://creativecommons.org/licenses/by/4.0/deed.en CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/deed.en