Rudolf Kohlrausch
Rudolf Hermann Arndt Kohlrausch (born November 6, 1809 in Göttingen , † March 8, 1858 in Erlangen ) was a German physicist and university professor.
Life
Kohlrausch, son of the Royal Hanoverian General headmaster Heinrich Friedrich Theodor Kohlrausch , studied mathematics and physics at the universities of Bonn and Göttingen , where he in 1832 to Dr. phil. received his doctorate . From 1833 to 1835 he was a teacher of physics and mathematics, first at the Knight Academy in Lüneburg , then from 1835 to 1849 at the grammar school in Rinteln . In 1849 he was appointed professor at the Polytechnic in Kassel , from where he moved to the grammar school in Marburg in 1851 for political reasons . In 1853 he was an associate professor of physics at the local university , and in 1857 a full professor at the University in Erlangen . In 1856 he was elected a corresponding member of the Göttingen Academy of Sciences . He was the father of the physicists Friedrich Kohlrausch and Wilhelm Kohlrausch as well as the agricultural chemist Otto Kohlrausch.
plant
Together with Wilhelm Eduard Weber , he determined the relationship between electrostatic and electromagnetic units and thus confirmed one of the conclusions from the Maxwell equations .
which underlies every newer electromagnetic system of units . He reported for the first time in 1854 (letter to Andreas von Ettingshausen ) on preliminary results; Weber did not publish the measurements until 1864 .
He investigated the “electrical residue” in the Leyden bottle , in today's understanding the relaxation of the polarization of a glass, and used the extended exponential function for this
a, which is now also called the "Kohlrausch function" or "Kohlrausch-Williams-Watts function". It was rediscovered in 1970 by Graham Williams and David Watts.
literature
- Eugen Lommel : Kohlrausch, Rudolf . In: Allgemeine Deutsche Biographie (ADB). Volume 16, Duncker & Humblot, Leipzig 1882, p. 452 f.
Web links
- Literature by and about Rudolf Kohlrausch in the catalog of the German National Library
Individual evidence
- ↑ The Rintelner Gymnasium in the mirror of the time 1817–1967 ed. from the Ernestinum high school. Bösendahl, Rinteln 1967, p. 96
- ↑ Holger Krahnke: The members of the Academy of Sciences in Göttingen 1751-2001 (= Treatises of the Academy of Sciences in Göttingen, Philological-Historical Class. Volume 3, Vol. 246 = Treatises of the Academy of Sciences in Göttingen, Mathematical-Physical Class. Episode 3, vol. 50). Vandenhoeck & Ruprecht, Göttingen 2001, ISBN 3-525-82516-1 , p. 136.
- ^ Austrian Biographical Lexicon 1815–1950 : Otto Kohlrausch
- ↑ Rudolf Kohlrausch: Theory of the electrical residue in the Leidner bottle . In: Annals of Physics and Chemistry . tape 91 , 1854, pp. 56-82, 179-214 ( online (pp. 56-82) online (pp. 179-214) ).
personal data | |
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SURNAME | Kohlrausch, Rudolf |
ALTERNATIVE NAMES | Kohlrausch, Rudolf Hermann Arndt (full name) |
BRIEF DESCRIPTION | German physicist |
DATE OF BIRTH | November 6, 1809 |
PLACE OF BIRTH | Goettingen |
DATE OF DEATH | March 8, 1858 |
Place of death | gain |