Difference between revisions of "Gravitational waves"
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:<math> \bar{h}_{ij} =</math> gravitational wave, and <math>I_{ij} =</math> mass quadrupole moment. | :<math> \bar{h}_{ij} =</math> gravitational wave, and <math>I_{ij} =</math> mass quadrupole moment. | ||
| − | The results of his findings were published in 1916 as ''Näherungsweise Integration der Feldgleichungen der Gravitation'' (''"Approximate Integration of the Field Equations of Gravitation"''), but serious errors led him to a revision, published in 1918 as ''Über Gravitationswellen'' (''"About Gravitational Waves"''). | + | The results of his findings were published in 1916 as ''Näherungsweise Integration der Feldgleichungen der Gravitation'' (''"Approximate Integration of the Field Equations of Gravitation"''),<ref>Einstein, Albert. "Näherungsweise Integration der Feldgleichungen der Gravitation"; ''Proceedings of the Royal Prussian Academy of Sciences'' (1916), Berlin, Germany.</ref> but serious errors led him to a revision, published in 1918 as ''Über Gravitationswellen'' (''"About Gravitational Waves"'')<ref>Einstein, Albert. "Über Gravitationswellen"; ''Proceedings of the Royal Prussian Academy of Sciences'' (1918), Berlin, Germany. |
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== See also == | == See also == | ||
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==References== | ==References== | ||
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[[Category:Relativity]] | [[Category:Relativity]] | ||
[[category:physics]] | [[category:physics]] | ||
Revision as of 01:48, June 20, 2016
- Gravitational waves are often incorrectly called "Gravity waves". See that page for a discussion of this point.
Gravitational waves are distortions in space that travel at the speed of light away from a mass that accelerates. Predicted by Albert Einstein's Theory of Relativity in 1916, gravitational waves had never been observed until 2015, when the first evidence of their existence was confirmed[1].
Description
Gravitational waves are essentially "ripples", similar to the ripples made in a pond when a pebble is tossed in, but on a cosmological scale. The mass in question are binary systems - pulsars, neutron stars, or black holes - which orbit around each other. According to Einstein's General Theory of Relativity and his formula E=mc2, both objects emit gravitational waves while losing energy as they gradually approach, eventually resulting in a collision at one-half the speed of light, forming a single object as well as emitting a final, very strong burst of gravitational waves
As part of his relativity theory, Einstein came up with his "quadrupole formula", which describes the rate of wave emmissions from a system of astronomical masses based on the change of the mass itself, what he called the "quadrupole moment". His formula as originally postulated was
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \bar{h}_{ij} =} gravitational wave, and mass quadrupole moment.
The results of his findings were published in 1916 as Näherungsweise Integration der Feldgleichungen der Gravitation ("Approximate Integration of the Field Equations of Gravitation"),[2] but serious errors led him to a revision, published in 1918 as Über Gravitationswellen ("About Gravitational Waves")[3].
See also
- LIGO
- Theory of relativity
- Counterexamples to Relativity
- Essay:Rebuttal to Counterexamples to Relativity
References
- ↑ http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.116.061102
- ↑ Einstein, Albert. "Näherungsweise Integration der Feldgleichungen der Gravitation"; Proceedings of the Royal Prussian Academy of Sciences (1916), Berlin, Germany.
- ↑ Einstein, Albert. "Über Gravitationswellen"; Proceedings of the Royal Prussian Academy of Sciences (1918), Berlin, Germany.