Timeline for Do photons lose energy due to gravitational redshift? If so, where does the lost energy go?
Current License: CC BY-SA 3.0
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| Jun 4, 2020 at 16:03 | history | edited | CommunityBot |
Commonmark migration
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| Mar 29, 2015 at 21:26 | comment | added | John Davis | @innisfree You could argue that it only truly makes sense to talk about gravitational red-shift in the context of static asymptotically flat spacetimes as you need to be able to define a gravitational potential to point to as the cause of the red-shift (for example we don't talk about cosmological red-shift as gravitational red-shift). Therefore you can relate gravitational red-shift to global energy conservation. | |
| Mar 29, 2015 at 3:29 | comment | added | anna v | @innisfree your feeling is going against the feeling of this mathematical exploration. In any case the question is in the limited special case, which after all is similar to where we are living. | |
| Mar 28, 2015 at 20:38 | comment | added | innisfree | the link is an essay by a famous mathematical physicist, john baez, about energy conservation in GR. does that not suggest that it is a nuanced issue? his comment applies to a limited special case, static, asymptotically flat space-time (and even there i'm unsure). | |
| Mar 28, 2015 at 20:06 | comment | added | innisfree | is it clear that energy is conserved in gravitational red shift? is the "potential energy" of gravity well-defined in that case? that's a genuine question - I'm honestly not sure, but my feeling is that it isn't. | |
| Mar 28, 2015 at 20:04 | comment | added | anna v | @innisfree the question is not about energy conservation in general relativity but about gravitational red shift, where it is OK | |
| Mar 28, 2015 at 20:02 | history | edited | anna v | CC BY-SA 3.0 |
clarification on energy conservation
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| Mar 28, 2015 at 19:54 | comment | added | innisfree | Energy conservation in GR is a very nuanced issue. I don't think this answer addresses complications that arise in GR, and as such, I think it's misleading. | |
| Mar 28, 2015 at 19:50 | history | undeleted | anna v | ||
| Mar 28, 2015 at 19:50 | history | edited | anna v | CC BY-SA 3.0 |
deleted 61 characters in body
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| Mar 28, 2015 at 19:48 | history | deleted | anna v | via Vote | |
| Mar 28, 2015 at 19:44 | history | answered | anna v | CC BY-SA 3.0 |