3 ms·
>The only way they would interact with gravity would be through the shape of spacetime itself, which for some reason is a fascinating to me. Photons are massle
by whatshisface 5y ago
>The only way they would interact with gravity would be through the shape of spacetime itself, which for some reason is a fascinating to me.
Photons are massless particles, but alas, they still gravitate because it's mass-energy that gravitates, not rest mass.
- Koshkin 5y agoSo… Just like the neutrinos?
- whatshisface 5y agoNeutrinos aren't massless, but quite like the neutrinos because they're light. Err, unheavy.
- pja 5y agoNo, because neutrinos are believed to have non zero rest mass.
- 6gvONxR4sf7o 5y ago> it's mass-energy that gravitates, not rest mass. TIL! That's a very fun fact. I never learned that, and I have a physics undergrad! Or I forgot it, which is just as likely this far out.
- wholinator2 5y agoIve been around that too and was never explicitly stated but implied by equations once you can calculate with relativity. I mean, they never even formally introduced us to electron volts, I just figured it out myself cause I assumed I was behind the class.