Timeline for Does gravitational redshift conserve energy?
Current License: CC BY-SA 4.0
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| Jun 14 at 23:20 | comment | added | Statico | @DerekSeabrooke, the best way I can describe this is that locality makes things much easier. The density of the universe and the gravitational potential are not static in an expanding universe (this is key). The “climb” in gravitational redshift is through a static or quasi-static potential, whereas in cosmological redshift, the photon travels through a spacetime that itself is expanding and evolving, making energy conservation non-trivial. | |
| Jun 14 at 23:15 | comment | added | Derek Seabrooke | That certainly seems logical but why would cosmological redshift be different. The photon is coming from a denser place so wouldn't this be equivelent to climbing? | |
| Jun 14 at 23:11 | history | answered | Statico | CC BY-SA 4.0 |