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quote:Originally posted by DoctorBeaverIt has been hypothesised that gravity is carried by particles called gravitons. Would they have an antiparticle equivalent? If so, could they be the cause of the acceleration in the expansion of the universe? Also, would an anti-graviton have to obey the laws on FTL? [xx(]
quote:Originally posted by McQueen... And since electron/positron pairs have photons as both the causative and end factors in their existence , the propagation of electromagnetic radiation must be closely involved with these “virtual” particles. But , and this is the question , how are they involved? Quantum mechanics ( or QED) gives a totally unsatisfactory answer to these questions. Am I right?
quote:Originally posted by Dr. PraetoriaI believe that I read that possibly, anti-particles could be thought of has travelling "backwards in time" which would contradict Einstein's Special Relativity.