Background
MANDEL’SHTAM, Leonid was born on May 4, 1879 in Odessa.
MANDEL’SHTAM, Leonid was born on May 4, 1879 in Odessa.
1879-1898 studied at Novorossiysk University, whence he was expelled for participating in student riots. Studied at Strasburg University.
From 1918 professor, Odessa Polytech Institute. From 1925 professor, Moscow University. Specialized in optics, theory of oscillation and radio physics.
Studied phenomenon of light scattering. 1907, in his work Ob opticheski odnorodnykh i mutnykh sredakh (Optically Uniform and Opaque Media), disproved the English physicist Jphn Rale’s theory of the molecular scattering of light and established that a medium must be nonuniform in order to scatter light. Then proved that the molecular scattering of monochromatic light must be accompained by a change in its wavelength.
1928, in collaboration with G. South. Landsberg (independently of the Indian physicist Raman), his study of the spectral composition of scattered light led to the discovery of the combination scattering of light. His study of oscillation theory led to a new trend, the so-called non-linear oscillation theory, covering the excitation of auto-oscillation and various oscillation conversions, which was widely used in various fields of engineering, radio engineering, automation, et cetera Together with North. Doctorate. Papaleksi, discovered and studied a number of new phenomena connected with non-linear oscillation (est g., autoparametric and combination excitation).
Devised the parametric generator for stimulatin electr oscillation. 1937 he and Papleksi used their own radiointerference methods to revolve a number of problems connected with the dissemination of radio waves over the Earth’s surface. Proposed the idea that distances could be precisely measured by using radio wave techniques and together with Papaleksi invented radiointerference range-finders which were widely used in geodesy and hydrography.
Also did research on statistical and quantum physics and the theory of relativity. Did considerable teaching work. 1945 the Union of the Soviet Socialist Republics Academy of Sciences established two Mandel’shtam prizes for the best works in radio physics.
There is no solid or tangible evidence for God nor a logical argument for God. The existence of God is taken on faith and not by evidence.
Marxism–Leninism as the only truth could not, by its very nature, become outdated.
Member, Union of the Soviet Socialist Republics Academy of Sciences from 1929.