Arthur Erich Haas
Encyclopedia
Arthur Erich Haas was an Austria
n physicist
, noted for a 1910 paper he submitted in support of this habilitation
as Privatdocent at the University of Vienna
that outlined a treatment of the hydrogen atom involving quantization of electronic orbitals, thus anticipating the Bohr model
(1913) by three years.
Haas’ paper, however, was initially rejected and even ridiculed. As noted in his autobiography, Haas recalls "When I lectured to the Chemical-Physical Society of Vienna... Lecher ...referred to the presentation during open discussion as a carnival joke" (The lecture was held during carnival time in Austria, February 1910). Soon thereafter, however, by September 1911 at a physical science convention in Karlsruhe, former detractors of Haas' work acknowledged it with greater enthusiasm as noted in a footnote: "We do not know what caused [a] change of mind in 1911 and can merely suggest the general trend of thinking at the time: 1910 saw the beginning of a universal shift of opinion of the quantum concept."
The significance of Haas' work lay in the establishment of a relationship between Planck's constant and atomic dimensions, having been first to correctly estimate the magnitude of what is today known as the Bohr radius
.
Austria
Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...
n physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
, noted for a 1910 paper he submitted in support of this habilitation
Habilitation
Habilitation is the highest academic qualification a scholar can achieve by his or her own pursuit in several European and Asian countries. Earned after obtaining a research doctorate, such as a PhD, habilitation requires the candidate to write a professorial thesis based on independent...
as Privatdocent at the University of Vienna
University of Vienna
The University of Vienna is a public university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world...
that outlined a treatment of the hydrogen atom involving quantization of electronic orbitals, thus anticipating the Bohr model
Bohr model
In atomic physics, the Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with electrostatic forces providing attraction,...
(1913) by three years.
Haas’ paper, however, was initially rejected and even ridiculed. As noted in his autobiography, Haas recalls "When I lectured to the Chemical-Physical Society of Vienna... Lecher ...referred to the presentation during open discussion as a carnival joke" (The lecture was held during carnival time in Austria, February 1910). Soon thereafter, however, by September 1911 at a physical science convention in Karlsruhe, former detractors of Haas' work acknowledged it with greater enthusiasm as noted in a footnote: "We do not know what caused [a] change of mind in 1911 and can merely suggest the general trend of thinking at the time: 1910 saw the beginning of a universal shift of opinion of the quantum concept."
The significance of Haas' work lay in the establishment of a relationship between Planck's constant and atomic dimensions, having been first to correctly estimate the magnitude of what is today known as the Bohr radius
Bohr radius
The Bohr radius is a physical constant, approximately equal to the most probable distance between the proton and electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom...
.
Works
- Einführung in die theoretische Physik (2 volumes) (1919)
- Naturbild der Neuen Physik (1920)
- Atomtheorie (1924)
- Materiewellen und Quantenmechanik (1928)
- Die Grundlagen der Quantenchemie (1929)
- Umwaldlungen der chemischen Elemente (1935)
External links
- Arthur Erich Haas - FREE Arthur Erich Haas Biography | Encyclopedia.com: Facts, Pictures, Information! at www.encyclopedia.com
- Arthur Erich Haas at the aeiou EncyclopediaAeiou EncyclopediaAEIOU is a free online collection of reference works in both German and English about Austria-related topics.-Background:...