World Library  
Flag as Inappropriate
Email this Article

Rudolf Kohlrausch

Article Id: WHEBN0015650931
Reproduction Date:

Title: Rudolf Kohlrausch  
Author: World Heritage Encyclopedia
Language: English
Subject: Stretched exponential function, Maxwell's equations, Speed of light, Electromagnetic radiation, Index of physics articles (R)
Publisher: World Heritage Encyclopedia

Rudolf Kohlrausch

Rudolf Kohlrausch (1809-1858)

Rudolf Hermann Arndt Kohlrausch (November 6, 1809, Göttingen - March 8, 1858, Erlangen) was a German physicist.


He was a native of Göttingen, the son of educator Heinrich Friedrich Theodor Kohlrausch. He was successively teacher of mathematics and physics at Lüneburg, Rinteln, Kassel and Marburg. In 1853 he became an associate professor at the University of Marburg, and four years later, a full professor of physics at the University of Erlangen.[1]


In 1854 Kohlrausch introduced the relaxation phenomena, and used the stretched exponential function to explain relaxation effects of a discharging Leyden jar (capacitor).[2] In 1856, with Wilhelm Weber (1804–1891), he demonstrated that the ratio of electrostatic to electromagnetic units produced a number that matched the value of the then known speed of light.[3] This finding was instrumental towards Maxwell's conjecture that light is an electromagnetic wave. Also, the first usage of the letter "c" to denote the speed of light was published in an 1856 paper by Kohlrausch and Weber.


He was the father of physicist Friedrich Kohlrausch.

Published works

  • Elektrodynamische Maaßbestimmungen : insbesondere Zurückführung der Stromintensitäts-Messungen auf mechanisches Maass (with Wilhelm Weber) 1857.[4]


  1. ^ ADB:Kohlrausch, Rudolf @ Allgemeine Deutsche Biographie
  2. ^ NCBI Quantitative fluorescence loss in photobleaching for analysis of protein transport and aggregation BMC Bioinformatics. 2012; 13: 296. Published online Nov 13, 2012. doi: 10.1186/1471-2105-13-296
  3. ^ Speed of Light, NJSAS Weber and Kohlrausch: the Ratio of Electrostatic to Electromagnetic Units
  4. ^ OCLC Elektrodynamische Maaßbestimmungen


  • "The evolution of applied harmonic analysis" by Elena Prestini
  • PhysicsWorld "Blast from the Past"

External links

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.