STARK, J.

Über die Lichtemission der Kanalstrahlen in Wasserstoff.

(Leipzig, Johann Ambrosius Barth, 1906). 8vo. No wrappers. Extracted from "Annalen der Physik" Vierte Folge. Bd. 21. Entire issue no. 13 offered. Pp. 401-456. [Entire issue: Pp. 401-608].

First appearance of Stark's extensive paper and most detailed paper on the Doppler-effect. In 1919 he was awarded the Nobel Prize in physics: "for his discovery of the Doppler effect in canal rays and the splitting of spectral lines in electric fields".

"With the relatively elaborate equipment available to him in his own laboratory at Aachen, Stark completed his research in progress, chiefly on the dissymmetry of Bremsstrahlung, and undertook new series of experiments on the splitting of spectral lines in an electric field. While at Göttingen he had been encouraged by Woldemar Voigt to investigate this electrical analogy to the magnetic Zeeman effect. Stark’s first preparatory experiment, at the beginning of 1906, had been a failure; but he was successful in October 1913. He described the experiment in a short autobiographical account. Having procured all the necessary equipment -"a high-intensity spectrograph of rather large dispersion, high-tension sources, and Gaede pumps" - he looked for the effect "simultaneously in the hydrogen and helium lines." An electric field of between 10,000 and 31,000 volts/cm, was established in the canal-ray tube." (DSB)

Order-nr.: 50376