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- Old_quantum_theory abstract "The old quantum theory is a collection of results from the years 1900–1925 which predate modern quantum mechanics. The theory was never complete or self-consistent, but was a collection of heuristic prescriptions which are now understood to be the first quantum corrections to classical mechanics. The Bohr model was the focus of study, and Arnold Sommerfeld made a crucial contribution by quantizing the z-component of the angular momentum, which in the old quantum era was called space quantization (Richtungsquantelung). This allowed the orbits of the electron to be ellipses instead of circles, and introduced the concept of quantum degeneracy. The theory would have correctly explained the Zeeman effect, except for the issue of electron spin.The main tool was Bohr–Sommerfeld quantization, a procedure for selecting out certain discrete set of states of a classical integrable motion as allowed states. These are like the allowed orbits of the Bohr model of the atom; the system can only be in one of these states and not in any states in between. The theory did not extend to chaotic motions.".
- Old_quantum_theory wikiPageExternalLink cer-000052203.pdf.
- Old_quantum_theory wikiPageID "1188104".
- Old_quantum_theory wikiPageRevisionID "606388589".
- Old_quantum_theory hasPhotoCollection Old_quantum_theory.
- Old_quantum_theory subject Category:History_of_physics.
- Old_quantum_theory subject Category:Quantum_mechanics.
- Old_quantum_theory comment "The old quantum theory is a collection of results from the years 1900–1925 which predate modern quantum mechanics. The theory was never complete or self-consistent, but was a collection of heuristic prescriptions which are now understood to be the first quantum corrections to classical mechanics.".
- Old_quantum_theory label "Antiga teoria quântica".
- Old_quantum_theory label "Old quantum theory".
- Old_quantum_theory label "Vecchia teoria dei quanti".
- Old_quantum_theory label "نظرية الكم القديمة".
- Old_quantum_theory label "前期量子論".
- Old_quantum_theory label "舊量子論".
- Old_quantum_theory sameAs Vecchia_teoria_dei_quanti.
- Old_quantum_theory sameAs 前期量子論.
- Old_quantum_theory sameAs Antiga_teoria_quântica.
- Old_quantum_theory sameAs m.043tw8_.
- Old_quantum_theory sameAs Q2566926.
- Old_quantum_theory sameAs Q2566926.
- Old_quantum_theory wasDerivedFrom Old_quantum_theory?oldid=606388589.
- Old_quantum_theory isPrimaryTopicOf Old_quantum_theory.