Talk #44b, 1/21/09

Atomic Models and the Old Quantum Theory

Giancarlo Borgonovi and Bill Scott

The years 1900-1923 saw the development of the old quantum theory. The main milestones of this period are the discovery of the nucleus by Rutherford (1911) and the introduction of the first quantum model of the atom by Bohr (1913).

1908rutherford     Scanned at the American Institute of Physics, Emilio Segre Visual Archives.

Methods and ideas developed within the framework of the old quantum theory, although drastically changed by the appearance of QM, still maintained a practical value value in succeeding years (e.g. notations for electronic states, and interpretation of optical spectra).


The following is a link to the full PowerPoint presentation.