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| 1921: | Stern & Gerlach demonstrate spatial quantization and the necessity
of
the intrinsic magnetic moment of the electron
Albert Einstein (See 1905 & 1915)
receives Nobel
Prize in physics
(theoretical contributions and the photoelectric effect)
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| 1922: | Niels Bohr (See 1913) receives Nobel Prize in physics (structure of and radiation from atoms) |
| 1923: | Compton demonstrates change in X-ray wavelength due to scattering from
electrons
(The Compton Effect)
Robert Andrews Millikan (See 1916) receives Nobel
Prize in physics
(electron and photoelectric effect)
|
| 1924: | Zworkin Invents the Picture Tube
de Broglie postulates the wave behavior of particles Karl Manne Georg Siegbahn receives Nobel Prize in physics (X-ray spectroscopy) |
| 1925: | Pauli proposes the Exclusion Principle
Goudsmit & Uhlenbeck introduce the concept of intrinsic angular momentum (spin) Heisenberg proposes matrix mechanics (Quantum Mechanics) James Franck and Gustav Hertz receive Nobel Prize in physics (electron-atom scattering) |
| 1926: | Schrödinger introduces wave mechanics (Quantum Mechanics)
Born establishes statistical (probabilistic) interpretation of Schrödinger's wave functions Jean Baptiste Perrin receives Nobel Prize in physics (sedimentation equilibrium) |
| 1927: | Black Invents the Negative Feedback Amplifier
Heisenberg develops uncertainty principle Independantly, Davisson & Germer and G.P. Thompson demonstrate wave nature of electrons Arthur Holly Compton (See 1923) receives Nobel Prize in physics (the Compton Effect) Charles Thomson Rees Wilson receives Nobel Prize in physics (visualization of path of charged particles via vapor
condensation)
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| 1928: | Dirac Proposes relativistic quantum theory
Sir Owen Willans Richardson receives Nobel Prize in physics (thermionic phenomena esp. Richardson's Law)
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| 1929: | Hubble reports evidence of expansion of the universe
Prince Louis-Victor de Broglie (See 1924) receives Nobel Prize in physics (wave nature of electrons)
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| 1930: | First World Cup Soccer Match
Sir Chandrasekhara Venkata Raman receives Nobel Prize in physics (Raman effect) |