Christian Christiansen

Christian Christiansen (9 October 1843 in Lønborg, Denmark – 28 November 1917 Frederiksberg) was a Danish physicist.

For the Danish pianist and organist, see Christian Christiansen (musician). For the Danish filmmaker, see Christian E. Christiansen.
Christian Christiansen
Born(1843-10-09)October 9, 1843
DiedNovember 28, 1917(1917-11-28) (aged 74)
NationalityDanish
Years active1870s-1912
Known forChristiansen effect

Christiansen first taught at the local polytechnical school. In 1886, he was appointed to a chair for physics at the University of Copenhagen.

He mainly studied radiant heat and optical dispersion, discovering the Christiansen effect (Christiansen filter). Around 1917, he discovered the anomalous dispersion of numerous dyes, including aniline red (fuchsine), by recording absorption spectra.

In 1884, he confirmed the Stefan–Boltzmann law.

Christiansen was elected a member of the Royal Swedish Academy of Sciences in 1902.

He was doctoral advisor to Niels Bohr. In 1912, he retired and Martin Knudsen became professor.

Citations
  • C. Christiansen, Lærebog i fysik, Copenhagen, 1892
  • C. Christiansen, Indledning til den mathematiske Fysik, 2 Bde, 1887-1889
  • C. Christiansen, Untersuchungen über die optischen Eigenschaften von fein vertheilten Körpern - Erste Mittheilung, Ann. Phys., Vol. 23, pp. 298–306, 1884
  • C. Christiansen, Untersuchungen über die optischen Eigenschaften von fein vertheilten Körpern - Zweite Mittheilung, Ann. Phys., vol. 24, pp. 439–446, 1885
  • C. Christiansen Elements of Theoretical Physics translated into English by W. F. Magie from the German translation of Johannes Julius Christoph Müller (London, McMillan, 1897)[1]
gollark: Please add it as some sort of backgroundable function in the chatbox API.
gollark: I really do *not* want an autorun program in the ROM.
gollark: PotatOS actually uses a different one, which is not made for CC and actually works.
gollark: Yes.
gollark: 1. made for os.loadAPI2. ignores existing Lua JSON libraries3. does not support escape sequences correctly

References
  1. Mackenzie, A. Stanley (1898). "Review: Elements of Theoretical Physics by C. Christiansen, translated into English by W. F. Magie" (PDF). Bull. Amer. Math. Soc. 4 (6): 276–277. doi:10.1090/s0002-9904-1898-00496-2.


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