Helmut Hönl

from Wikipedia, the free encyclopedia
Hönl (3rd from left) in Leiden in 1926

Helmut Hönl (born February 10, 1903 in Mannheim ; † March 29, 1981 in Freiburg im Breisgau ) was a German theoretical physicist.

From 1921 Hönl studied physics at the University of Heidelberg (where he also studied mathematics, geology and mineralogy and studied philosophy with Karl Jaspers and Heinrich Rickert ) and the Ludwig Maximilians University in Munich , where he received his doctorate from Arnold Sommerfeld in 1926 ( on the intensity problem of the spectral lines ). He also studied for a year in Göttingen with Max Born, among others . As a post-doctoral student , he spent a year on a scholarship at the University of Utrecht and then a short time assistant to Gustav Mie in Freiburg. In 1929 he became an assistant to Paul Peter Ewald at the TH Stuttgart . In 1933 he completed his habilitation there and was a private lecturer. In 1938, together with Achille Papapetrou , he set up an electron model (pole-dipole particle) in which a point-like electron revolves around a circle with a radius - the Hönl tremor radius - at the speed of light. In 1940 he became an associate professor at the University of Erlangen and in 1943 a full professor for theoretical physics at the Albert Ludwig University of Freiburg . In 1971 he retired.

He dealt with atomic physics (work in the older quantum theory on the intensity of the lines of the Zeeman effect , as at the same time Samuel Goudsmit , Ralph Kronig ), solid state physics (in the time with Ewald), general relativity and cosmology. Here he showed that Mach's principle is only fulfilled by certain classes of cosmological solutions of Einstein's theory of gravity.

He worked with Fritz London (in the 1920s on the intensity of spectral lines), Carl Henry Eckart and Achille Papapetrou (in Stuttgart on the theory of relativity). Hubert Goenner is one of his doctoral students .

He had been a member of the Leopoldina since 1961 .

literature

  • Anastasios Giannaras (editor) Convivium Cosmologicum: interdisciplinary studies on cosmology. Helmut Hönl on his 70th birthday , Birkhäuser 1973

Web links

Individual evidence

  1. ↑ Freiburg University Archives
  2. ↑ Helmut Hönl: About the Mach principle. In: Journal of Nature Research A . 8, 1953, pp. 2–6 ( PDF , free full text).
  3. ↑ Hönl, Heinz Dehnen on Machsche and Anti-Machsche solutions of the field equations of gravitation , Annalen der Physik, Volume 11, 1963, p. 201, Part 2 by Hönl, Annalen der Physik, Volume 14, 1964, p. 271. Hönl General Relativistic dynamics and Mach's principle , Zeitschrift für Physik, Volume 191, 1966, p. 313. Hönl Albert Einstein and Ernst Mach , Physikalische Blätter, Volume 35, 1979, pp. 485-494
  4. ↑ Eckart, Hönl Fundamentals and Results of Wave Mechanics , Physikal. Journal, Volume 31, 1930, pp. 89, 145
personal data
SURNAME Hönl, Helmut
BRIEF DESCRIPTION German theoretical physicist
DATE OF BIRTH February 10, 1903
PLACE OF BIRTH Mannheim
DATE OF DEATH March 29, 1981
Place of death Freiburg in Breisgau