3 ms·
If a photon is deflected by a black hole, it must also impart momentum to the black hole. But this means it imparts energy as well, so shouldn't it be red shift
by bobbylarrybobby 4y ago
If a photon is deflected by a black hole, it must also impart momentum to the black hole. But this means it imparts energy as well, so shouldn't it be red shifted as well?
- mxkopy 4y agoThat's true but it's also true of some other dark body of the same mass. "do nothing to refracted light" was poor wording, my bad - it's more like gravitational lensing is the only thing that happens to its light, as opposed to adding new peaks to the spectrograph and such.