Showing 50 of 25456 papers

Some Questions Concerning the Intensities of Spectral Lines

S. È. Frisch
1951 SovietRxiv: ru-195101.90478

Questions concerning the intensities of spectral lines are very diverse and complex, and in the present article we shall consider only a few of them, and the simplest ones at that. Such a consideration nevertheless seems to us not superfluous, since in the existing literature ambiguities are often e…

INTRAMOLECULAR INTERACTIONS AND OPTICS

M. V. Vol'kenshtein
1951 SovietRxiv: ru-195101.87150

In this short article, we do not, of course, intend to consider in any exhaustive way the entire vast field of applications of optical methods to the solution of chemical problems and to the study of molecular structure. We shall confine ourselves to several examples of the optical study of a highly…

Conference on Color Photography and Cinematography

Yu. N. Gorokhovskii
1951 SovietRxiv: ru-195101.77905

From October 23 to 27, 1950, a conference on color photography and cinematography was held in Moscow. This conference was the second convened by the Commission on Scientific Photography and Cinematography under the Division of Chemical Sciences of the Academy of Sciences of the USSR.

Fresnel Diffraction by Convex Bodies

V. A. Fok
1951 SovietRxiv: ru-195101.77834

In the present work, using diffraction by a sphere as an example, we show that, for bodies with finite curvature as well, the principal term in the expression for the field behind the body is expressed through Fresnel integrals. This term, as in the case of ordinary Fresnel diffraction, does not dep…

PHOTOELECTRO-OPTICAL AMPLIFIER

B. P. Kozyrev
1951 SovietRxiv: ru-195101.74015

This article is a brief summary of the works for which the author was awarded the Stalin Prize by decree of the Council of Ministers (“Pravda,” March 4, 1950).

LUMINESCENCE OF ACTIVATED CRYSTALS

V. L. Levshin
1951 SovietRxiv: ru-195101.71052

This article is devoted to the consideration of the luminescence of the most technically important class of luminescent substances—the class of crystalline phosphors.