Helmut Hönl

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

Hönl studied from 1921 physics at the University of Heidelberg ( where he also heard mathematics, geology and mineralogy, and Karl Jaspers, and Heinrich Rickert philosophy) and the Ludwig- Maximilians- University of Munich, where he earned his doctorate under Arnold Sommerfeld in 1926 ( to the intensity problem of spectral lines ). He also studied a year in Göttingen among others, Max Born. As a post - graduate student he was a year with a scholarship at the University of Utrecht and after a short time assistant to Gustav Mie in Freiburg. In 1929 he became an assistant of Paul Peter Ewald at Stuttgart. In 1933 he was habilitated there and lecturer. In 1938, he compiled an electron model in which a point-like electron on a circle with radius - the radius Hönlschen jitter - rotates at the speed of light. In 1940 he became an associate professor at the University of Erlangen and in 1943 full professor of theoretical physics at the Albert -Ludwigs- University of Freiburg. In 1971 he retired.

It dealt among other things with atomic physics (working in the older quantum theory of the intensity of the lines of the Zeeman how simultaneously Samuel Goudsmit, Ralph Kronig ), Solid State Physics ( in time with Ewald ), General Relativity and Cosmology. Here he showed that Mach's principle is satisfied only by certain classes of cosmological solutions of Einstein's gravitational theory.

He has worked with Fritz London ( in the 1920s about the intensity of spectral lines ), Carl Henry Eckart and Achille Papapetrou ( in Stuttgart on relativity theory). His doctoral counts Hubert backers.

He was a member of the Leopoldina since 1961.