Phenomenon of gravitational repulsion in the general theory of relativity
| Autor: | L. Ya. Arifov |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Gravitational time dilation
Physics Gravitational constant General Relativity and Quantum Cosmology Centers of gravity in non-uniform fields Classical mechanics Gravitational field General relativity Quantum mechanics General Physics and Astronomy Classical field theory Gravitational energy Gravitational redshift |
| Zdroj: | Soviet Physics Journal. 24:346-351 |
| ISSN: | 1573-9228 0038-5697 |
| DOI: | 10.1007/bf00898270 |
| Popis: | Einstein's generalization of Newton's theory of gravitation in the general theory of relativity led not only to small quantitative differences between gravitational effects in the relativistic theory and the Newtonian theory, but also to essentially new phenomena and effects peculiar to the relativistic theory and absent in the Newtonian theory. This difference is so large that the gravitational interaction in Einstein's theory even altered the attraction-only property, characteristic of Newton's theory, the law of universal gravitation, and became both attractive and repulsive. It is notable that the nature of the repulsion in gravitational interaction already appears in the simplest case of a spherically symmetric isolated body. Einstein's equations admit for a spherical body a solution whose physical interpretation uniquely indicates the repulsive nature of a gravitational field inside the body, if the number of particles that make up the body is sufficiently large. The structure of such a body, density distribution of the number of particles, mass, and pressure, is determined in the equilibrium state by the pressure of the substance, the gravitational attraction of peripheral layers toward the center, and the gravitational repulsion of inner layers of matter away from the center. As a result of the gravitational repulsion of matter away from the center inside the body there appears a cavity, free of the matter making up the body and its electromagnetic radiation. If the body is cold, then the volume of the world tube of the cavity can differ from zero. In the opposite case, the world tube of the cavity reduces to the world line of the center, which is inaccessible to particles of matter and to electromagnetic radiation. Gravitational repulsion, on the other hand, is a result of the existence of a field singularity at the center of the body, whose world line is time-like. |
| Databáze: | OpenAIRE |
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