kalkulat@lemmy.world to science@lemmy.world · 3 months agoNASA's solar sail successfully spreads its wings in spacewww.space.comexternal-linkmessage-square61fedilinkarrow-up11arrow-down10cross-posted to: technology@lemmy.world
arrow-up11arrow-down1external-linkNASA's solar sail successfully spreads its wings in spacewww.space.comkalkulat@lemmy.world to science@lemmy.world · 3 months agomessage-square61fedilinkcross-posted to: technology@lemmy.world
minus-squareMonkderVierte@lemmy.mllinkfedilinkarrow-up0·3 months agoSo photons only have no mass if they don’t move? Do they even exist if they don’t move?
minus-squaremarcos@lemmy.worldlinkfedilinkarrow-up0·3 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.
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