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Stefan, Josef#

Stefan, Josef, b. Klagenfurt (Carinthia), March 24, 1835, d. Vienna, Jan. 7, 1893, physicist. Founder of the Austrian "School of Physics", teacher of L. Boltzmann; 1863 university professor, 1866 Director of the Department of Physics of the University of Vienna; Secretary and Vice-President (1885) of the Academy of Sciences. His most important scientific achievements comprise his experimental studies on heat conductivity in gases by means of a ´diathermometer´ and the law of heat radiation intensity (= "T4-Gesetz" - one of the radiation laws based on Boltzmann's Law). S. was also partly responsible for recognition of the Maxwell Theory on the continental Europe; his work contributed to the understanding of acoustic and optical problems, as well as to electricity theory and to hydrodynamics.

Literature#

A. v. Obermayer, Zur Erinnerung an J. S., 1893.

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