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Christian Christiansen (October 9, 1843 in Loenborg, Denmark
Denmark

Denmark is a Scandinavian country in northern Europe and the senior member of the Kingdom of Denmark. It is the southernmost of the Nordic countries....
 – 1917) was a Danish physicist.

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

The University of Copenhagen is the oldest and largest university and research institution in Denmark. Founded in 1479, it has more than 37,000 students, a majority of whom are female , and more than 7,000 employees....
.

He mainly studied radiant heat and optical dispersion
Dispersion (optics)

In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency.Media having such a property are termed dispersive media....
, discovering the Christiansen effect
Christiansen effect

The Christiansen effect is named after the Danish physicist Christian Christiansen the effect of this filter is based on the various dispersions of two different media....
 (Christiansen filter). He found numerous absorption spectra
Absorption spectrum

A material's absorption spectrum shows the fraction of incident electromagnetic radiation absorption by the material over a range of frequencies....
 with abnormal dispersion
Dispersion

Dispersion can refer to:...
, among them aniline red.

In 1884 he confirmed the Stefan–Boltzmann law.

He was doctoral advisor to Niels Bohr
Niels Bohr

Niels Henrik David Bohr was a Denmark physicist who made fundamental contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922....
.








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Christian Christiansen (October 9, 1843 in Loenborg, Denmark
Denmark

Denmark is a Scandinavian country in northern Europe and the senior member of the Kingdom of Denmark. It is the southernmost of the Nordic countries....
 – 1917) was a Danish physicist.

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

The University of Copenhagen is the oldest and largest university and research institution in Denmark. Founded in 1479, it has more than 37,000 students, a majority of whom are female , and more than 7,000 employees....
.

He mainly studied radiant heat and optical dispersion
Dispersion (optics)

In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency.Media having such a property are termed dispersive media....
, discovering the Christiansen effect
Christiansen effect

The Christiansen effect is named after the Danish physicist Christian Christiansen the effect of this filter is based on the various dispersions of two different media....
 (Christiansen filter). He found numerous absorption spectra
Absorption spectrum

A material's absorption spectrum shows the fraction of incident electromagnetic radiation absorption by the material over a range of frequencies....
 with abnormal dispersion
Dispersion

Dispersion can refer to:...
, among them aniline red.

In 1884 he confirmed the Stefan–Boltzmann law.

He was doctoral advisor to Niels Bohr
Niels Bohr

Niels Henrik David Bohr was a Denmark physicist who made fundamental contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922....
.

Citations

  • C. Christiansen, Laerebog 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, , pp. 298-306, 1884
  • C. Christiansen, Untersuchungen über die optischen Eigenschaften von fein vertheilten Körpern - Zweite Mittheilung, , pp. 439-446, 1885
  • C. Christiansen translated into English by W. F. Magie from the German translation of Muller (London, McMillan, 1897)


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