3 ms·

Obviously gravity works on particles to condense into stars, which create light...so I'm guessing it's not talking about that?

• jacquesm 3y ago
  You added 'particles'.
  • joadha 3y ago
    The authors added "electromagnetic field", which also happens to involve particles.
    • jacquesm 3y ago
      To create one, yes. But to propagate it, no.
      • computerfriend 3y ago
        Photons are particles.