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Forums
Physics
Special and General Relativity
Field of Moving Masses: EM Purcell
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[QUOTE="pervect, post: 5477965, member: 14402"] The analogy isn't quite perfect - gravitational radiation is given by a quadrupole formula, EM radiation by a dipole formula. This is related to the issue that you just can't have a moving mass stop for no reason, the conservation of momentum is built into the Einstein field equations, and a mass stopping with no cause is therefore not a solution of Einstein's field equations. So you need to reformulate your test problem in a way that conserves momentum in order to actually solve the equations and get out a number for gravitational radiation. See for instance the wiki [URL]https://en.wikipedia.org/wiki/Gravitational_wave[/URL] I snipped some confusing parts of the wiki article that relate to higher order moments. A slightly better statement of what I snipped is is from http://www.tat.physik.uni-tuebingen.de/~kokkotas/Teaching/NS.BH.GW_files/GW_Physics.pdf [/QUOTE]
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Forums
Physics
Special and General Relativity
Field of Moving Masses: EM Purcell
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