Wait photons don’t interact with gravity at all? It is just that the warping of spacetime by gravity effects light indirectly?
Wait photons don’t interact with gravity at all? It is just that the warping of spacetime by gravity effects light indirectly?
Gsus4@mander.xyz 5 weeks ago
Photons do have energy (in the stress-energy tensor), so they curve spacetime too, but all particles follow geodesics regardless of mass…so…I guess it is all the same from gravity’s PoV…it is QM that makes a difference…but entanglement doesn’t either (like gravity)…wink wink, nudge nudge…
PS: ok, ok, radiation’s energy density is 1/a⁴ and baryons is 1/a³, so there is a distinction there to having inertia towards gravity.