Geometrie und ErfahrungCourier Corporation, 01.01.1983 - 56 Seiten This concise volume contains two addresses by Dr. Einstein outlining aspects of the theories. "Ether and Relativity" (1920), delivered at the University of Leyden, discusses the properties demanded of the ether of space by the theory of relativity. "Geometry and Experience" (1921), given at the Prussian Academy of Sciences, describes the limits within which the Euclidean or any other practical geometric system can be held to be approximately true in connection with the concept of a finite universe. |
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absolute space according action Albert Einstein axiomatic geometry axioms bound clocks concepts disc-shadows distance electromagnetic field empty space equations ether hypothesis existence finite universe fundamental GEOMETRY AND EXPERIENCE globe gravitational ether gravitational field H. A. Lorentz Hertz idea imagine laws of disposition lines of force logical Lorentzian ether Mach's Max Born Maxwell mean density measuring-rods mechanical interpretation medium metry motion move nature Newton's law Newtonian theory order of magnitude paper discs physicists Poincaré ponderable masses ponderable matter possible practical geometry practically-rigid bodies principles properties question real things relations of real Riemann's rigid bodies rigid figures seems sense of Euclidean shadow solid bodies space is infinite spaces of cosmic spatially finite special theory spheres spherical geometry spherical surface stars STATISTICAL STATISTICAL MECHANICS STATISTICAL THERMODYNAMICS straight line theoretical physics theory of gravitation theory of relativity THERMODYNAMICS tion tract undulatory universal space universe is spatially University of Leyden velocities