geordief Posted July 15, 2018 Share Posted July 15, 2018 5 minutes ago, Markus Hanke said: Well, those are shear stresses, in the Newtonian sense: https://en.m.wikipedia.org/wiki/Shear_stress I can’t see how one could look at this in terms of non-uniformities. OK,thanks. Link to comment Share on other sites More sharing options...
DimaMazin Posted August 24, 2018 Author Share Posted August 24, 2018 On 14.07.2018 at 8:36 AM, Markus Hanke said: Sorry, I don’t understand. Can you explain the question some more? Are clocks slowed by energy-momentum tensor there where momentum of falling photon is increased by the energy -momentum tensor? Link to comment Share on other sites More sharing options...
Markus Hanke Posted August 25, 2018 Share Posted August 25, 2018 14 hours ago, DimaMazin said: Are clocks slowed by energy-momentum tensor there where momentum of falling photon is increased by the energy -momentum tensor? The energy-momentum tensor remains the same (more precisely: covariant) regardless of the state of relative motion of your test particle. Also, remember that GR is a purely classical theory, so strictly speaking it has no concept of photons - it would be more correct to speak either of an electromagnetic field, or of null dust. Either way, the energy-momentum tensor is always covariant. Link to comment Share on other sites More sharing options...
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