kalkulat@lemmy.world to science@lemmy.world · 1 year agoNASA's solar sail successfully spreads its wings in spacewww.space.comexternal-linkmessage-square69linkfedilinkarrow-up1489arrow-down11cross-posted to: technology@lemmy.world
arrow-up1488arrow-down1external-linkNASA's solar sail successfully spreads its wings in spacewww.space.comkalkulat@lemmy.world to science@lemmy.world · 1 year agomessage-square69linkfedilinkcross-posted to: technology@lemmy.world
minus-squaremarcos@lemmy.worldlinkfedilinkarrow-up4·1 year 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-squareMonkderVierte@lemmy.mllinkfedilinkarrow-up1·1 year agoElse they don’t. We are talking quantum here.
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.