pervect's latest activity
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Ppervect replied to the thread Undergrad Photons vs Gravitons.The treatment of light beams I've seen in the past (I think it was and ancient book by Tollman) used null dust to model light beams. I...
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Ppervect replied to the thread High School Einstein equations don't work at large scale?.That's going to be very difficult (if it is possible at all) to reconcile with existing evidence. Specifically, the constancy of the...
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Ppervect replied to the thread Undergrad Photons vs Gravitons.Energy, momenum, and stress all contribute to gravity in GR. Usually only the first two (energy and momentum) would be used used to...
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Ppervect replied to the thread Undergrad Comparing the time of two moving clocks.There's a paper that suggest an approach to explaining this problem using space-time diagrams. I like the approach a lot, but I haven't...
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Ppervect replied to the thread Graduate Is photon frequency intrinsic or observer-dependent?.The numerical value of the energy of a photon (or for GR, a classical pulse of radiation because the quantum concept of photons is...
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Ppervect replied to the thread Undergrad Definition of distance in GTR.I would say that the proper distance between the LIGO mirros changes with time when the gravitational wave passes. But, I'd say this is...