In one renormalization, electric field is relativistically invariant, so all force-induced fields, including reaction forces, form other particles using photon exchanges and go to zero {perfect absorption}. Perfect absorption has only retarded solutions, because advanced solutions are improbable by thermodynamic laws. In expanding universes, absorption happens at low frequency for retarded solutions and at high frequency for advanced solutions. However, this theory is not correct.
In a renormalization theory {Wheeler-Feynman theory}, universe particles absorb moving-charge electric field, so field at large distances is zero, and system has no advanced solutions and no infinities. However, this theory is not correct.
If general relativity has canonical quantization, Wheeler-DeWitt equation has no time coordinate {frozen time problem} {problem of frozen time} {problem of time} {time problem}.
5-Physics-Relativity-General Relativity-Theory
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Date Modified: 2022.0225