Rudolf Ladenburg
Rudolf Ladenburg | |
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 Ladenburg in 1937 | |
| Born | Rudolf Ladenburg 6 June 1882 |
| Died | 6 April 1952(aged 69) |
| Alma mater | University of Munich |
| Spouse | Else Uhthoff |
| Parent |
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| Scientific career | |
| Fields | Physics |
| Doctoral advisor | Wilhelm Röntgen |
Rudolf Walter Ladenburg(June 6, 1882 inKiel– April 6, 1952 inPrinceton, New Jersey) was a German atomic physicist. He emigrated from Germany as early as 1932 and became a Brackett Research Professor atPrinceton University.When the wave of German emigration began in 1933, he was the principal coordinator for job placement of exiled physicists in the United States.Albert Einsteingave the eulogy at Rudolf's funeral. He and his wife Else Uhthoff had three children, Margarethe, Kurt, and Eva. Kurt had two children, Toni and Nils Ladenburg.
Background
[edit]Ladenburg was the son of the Jewish chemistAlbert Ladenburg,ordinarius professor of chemistry at theUniversity of Kiel(1874–1899) and then at the formerUniversity of Breslau(1899–1909).[1]He was a non-practicing Jew and an atheist.[2]
Education
[edit]From 1900 to 1906, Ladenburg studied at theRuprecht-Karls-Universität Heidelberg,theUniversität Breslau,and theLudwig-Maximilians-Universität München.He received his doctorate underWilhelm Röntgenat Munich.[3]
Career
[edit]After completion of hisHabilitation,Ladenburg became aPrivatdozentat Breslau and in 1921 anausserordentlicher Professorthere. In 1924, he took an appointment at theFriedrich-Wilhelms-Universität(today, theHumboldt-Universität zu Berlin) along with becoming a scientific member of theKaiser-Wilhelm-Institut für physikalische Chemie und Elektrochemie(KWIPC, Kaiser Wilhelm Institute of Physical Chemistry and Electrochemistry) of theKaiser-Wilhelm Gesellschaft(KWG, Kaiser Wilhelm Society).[4]
Ladenburg went to the United States as early as 1930,[5]where he became aBrackett Research Professorat the Palmer Physics Laboratory,Princeton University.When the emigration wave from Germany began in April 1933, Ladenburg was the principal coordinator for the employment of exiled physicists in the United States. He retired from Princeton in 1950.[6][7]
Articles
[edit]- Rudolf Ladenburg and Stanislaw LoriaNature,Anomalous Dispersion of Luminous HydrogenVolume 79, 7-7 (5 November 1908)
- Rudolf LadenburgDie quantentheoretische Bedeutung der Zahl der Dispersionelektronen,Z. Phys.Volume 4, Number 4, 451-468 (1921). Received on 8 February 1921. Institutional affiliation:Breslau, Physikal. Institut der Universität.English translation:The quantum-theoretical number of dispersion electronsin B. L. van der WaerdenSources of Quantum Mechanics(Dover, 1968) pp. 139 – 157.
- R. Ladenburg and F. ReicheDispersionsgesetz und Bohrsche Atomtheorie,Die Naturwissenschaften,Volume 12, Issue 33, pp. 672–673 (1924)
- Hans Kopfermannand Rudolf LadenburgElektrooptische Untersuchungen am Natriumdampf. (Anomale elektrische Doppelbrechung; Starkeffekt an der Resonanzstrahlung),Annalen der Physik,Volume 383, Issue 23, pp. 659–679 (1925)
- Hans Kopfermann and Rudolf LadenburgUntersuchungen über die anomale Dispersion angeregter Gase II Teil. Anomale Dispersion in angeregtem Neon Einfluß von Strom und Druck, Bildung und Vernichtung angeregter Atome,Zeitschrift für PhysikVolume 48, Numbers 1-2, pp. 26–50 (January, 1928). Received 17 December 1927. Institutional affiliation:Kaiser-Wilhelm Institut für physikalische Chemie und Elektrochemie,Berlin-Dahlem.
- H. Kopfermann and R. LadenburgExperimental Proof of ‘Negative Dispersion’,NatureVolume 122, 438-439 (22 September 1928)
- R. Ladenburg and S. LevyUntersuchungen über die anomale Dispersion angeregter Gase VI. Teil: Kontrollversuche für den Nachweis der negativen Dispersion: Absorption, anomale Dispersion, Intensitätsverteilung und Intensität verschiedener NeonlinienZeitschrift für PhysikVolume 65, Numbers 3-4. pp. 189–206 (March, 1930). Received 12 August 1930. Institutional affiliation:Kaiser-Wilhelm Institut für physikalische Chemie und Elektrochemie,Berlin-Dahlem.
- Rudolf LadenburgDispersion in Electrically Excited GasesRev. Mod. Phys.Volume 5, 243 - 256 (1933). The author was cited as being at Princeton University.
- Rudolf W. LadenburgLight absorption and distribution of atmospheric ozone,Journal of the Optical Society of America,Volume 25, Issue 9, p. 259 (1935)
- Max Born,R. Fürth, and Rudolf LadenburgLong Duration of the Balmer Spectrum in Hydrogen,NatureVolume 157, pp. 159–159 (9 February 1946). Institutional affiliations: Born and Fürth were identified as being in the Department of Mathematical Physics, The University, Edinburgh, and Ladenburg was identified as being in the Palmer Physical Laboratory, Princeton University, Princeton, New Jersey.
Books
[edit]- Rudolf Walter LadenburgPlanck's elementares Wirkungsquantum und die Methoden zu seiner Messung(Hirzel, 1921)
Notes
[edit]- ^Hentschel and Hentschel, 1996, 227n22.
- ^Albert Ladenburg, Lebenserinnerungen (Breslau: Trewendt & Granier, 1912), pp. 51-52. Neither Willstätter nor Ladenburg were practicing Jews, and both were fully assimilated Germans. Ladenburg was in fact an atheist; for reasons that he does not explain, he finally underwent baptism in 1891.
- ^Hentschel and Hentschel, 1996, Appendix F; see the entry for Ladenburg.
- ^Hentschel and Hentschel, 1996, Appendix F; see the entry for Ladenburg.
- ^"New York, New York Passenger and Crew Lists, 1909, 1925-1957," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:24FB-ZC6:2 October 2015), Rudolf Ladenburg, 1930; citing Immigration, New York, New York, United States, NARA microfilm publication T715 (Washington, D.C.: National Archives and Records Administration, n.d.).
- ^Hentschel and Hentschel, 1996, p. 227.
- ^Hentschel and Hentschel, 1996, Appendix F; see the entry for Ladenburg.
Further reading
[edit]
- Hentschel, Klaus (Editor) and Ann M. Hentschel (Editorial Assistant and Translator)Physics and National Socialism: An Anthology of Primary Sources(Birkhäuser, 1996)
- Glaser, LudwigJuden in der Physik: Jüdische Physik,Zeitschrift für die gesamte NaturwissenschaftenVolume 5, Number 8, 272-272 (November 1939). Translated and published asDocument 77 Ludwig Glaser: Jews in Physics: Jewish Physics [November 1939],in Hentschel, Klaus (Editor) and Ann M. Hentschel (Editorial Assistant and Translator)Physics and National Socialism: An Anthology of Primary Sources(Birkhäuser, 1996) pp. 223–234.
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