Abstract
IN the case of unmixed vapours, E. v. Lommel (Wied. Ann.,, p. 856, 1883) has proved a fluorescence for iodine vapour, and this has been shown also by us (Wied. Ann. 56, p. 18, 1895) to be true for the vapours of numerous organic substances. In our latest experiments we have studied the behaviour of the vapour of metals in this respect.
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Translation of a communication to the "Sitzungsberichten der physikal. med. Societäl zu Erlangen." By Eilh Wiedemann and G. C. Schmidt.
A comparison of these fluorescence spectra with that which is obtained the heating of sodium vapour exhibits certain relations (Evershed, Phil. Mag. (5), 39, p. 460, 1895); the same is the case with both sodium and potassium, if the positions of the fluorescence spectra be compared with the absorption-band-spectra investigated by H. E. Roscoe and A. Schuster (Proc. Roy. Soc. London, 22, 262, 1894). In both cases the radiation towards the red appears altered.
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Fluorescence of Sodium and Potassium Vapours, and the Importance of these Facts in Astrophysics1. Nature 53, 250–251 (1896). https://doi.org/10.1038/053250a0
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DOI: https://doi.org/10.1038/053250a0