Sommerfeld–Bohr theory | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-31

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Old_quantum_theory


00:00:41 1 History
00:04:23 2 Basic principles
00:07:17 3 Examples
00:07:26 3.1 Thermal properties of the harmonic oscillator
00:15:22 3.2 One-dimensional potential: U=0
00:17:31 3.3 One-dimensional potential: U=Fx
00:19:55 3.4 One-dimensional potential: U=½kx²
00:21:54 3.5 Rotator
00:28:24 3.6 Hydrogen atom
00:31:57 3.7 Relativistic orbit
00:42:13 4 De Broglie waves
00:47:24 5 Kramers transition matrix
00:50:09 6 Limitations



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SUMMARY
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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 rather a set of heuristic corrections to classical mechanics. The theory is now understood as the semi-classical approximation to modern quantum mechanics.The main tool of the old quantum theory was the Bohr–Sommerfeld quantization condition, a procedure for selecting out certain states of a classical system as allowed states: the system can then only exist in one of the allowed states and not in any other state.