PACS:47.55.D−, 41.20.Cv (all) DOI:10.1070/PU1963v006n02ABEH003512 URL: https://ufn.ru/en/articles/1963/2/h/ Citation: Kaptsov L N "Lecture demonstration of ponderomotive forces in electrostatics with the aid of a soap film" Sov. Phys. Usp.6 324–324 (1963)