@kalkulat to science • 4 months agoNASA's solar sail successfully spreads its wings in spacewww.space.comexternal-linkmessage-square69arrow-up1489arrow-down11cross-posted to: technology[email protected]worldinprogress[email protected]
arrow-up1488arrow-down1external-linkNASA's solar sail successfully spreads its wings in spacewww.space.com@kalkulat to science • 4 months agomessage-square69cross-posted to: technology[email protected]worldinprogress[email protected]
minus-square@[email protected]linkfedilink1•4 months agoSo photons only have no mass if they don’t move? Do they even exist if they don’t move?
minus-square@marcoslink4•4 months ago Do they even exist if they don’t move? No. Or, at least not from our point of view. They only exist moving at the speed at light. All particles with no rest mass only exist moving at the speed of light.
minus-square@[email protected]linkfedilink1•4 months agoElse they don’t. We are talking quantum here.
So photons only have no mass if they don’t move? Do they even exist if they don’t move?
No. Or, at least not from our point of view.
They only exist moving at the speed at light. All particles with no rest mass only exist moving at the speed of light.
So photons do have mass?
only as long as they exist
Else they don’t. We are talking quantum here.