DU MORTIER B.C.Livre Rare Book
On the Dispersion and Absorption of Infra-Red Rays in Rock Salt and Sylvine.
1898111801898. Am. J. Sc. 5. - 1898 8° pp.33-46 5 Fig. orig. Broschur. Rare Offprint! Heinrich Rubens 1865-1922 physicist. He is known for his measurements of the energy of black-body radiation which led Max Planck to the discovery of his radiation law. This was the genesis of quantum theory. Rubens worked on electromagnetic radiation. particularly in the infrared. In 1900j he proved through measurements with Ferdinand Kurlbaum that Wien's law of radiation does not apply to the long-wave range. These precise investigations into the radiation of black bodies were essential for the development of the origins of quantum theory by Max Planck. He used the Auer gas incandescent light and proved that Planck's law of radiation also applies in the infrared part of the spectrum. He developed the method of Rubens' residual rays to generate infrared radiation and the Rubens flame tube named after him. He was regarded as a masterful experimenter who did not spare himself in his experiments he carried out the precision measurement of blackbody radiation for a long time at night in winter in an unheated laboratory in favourable weather conditions. His lecture experiments were also considered exemplary. Augustus Trowbridge 1870-1934 was a physics professor and dean at Princeton University. unknown
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