Light is a carrier of
electromagnetic force, in its form as a virtual particle. Nothing travels
faster than light because the largest field in existence is electro-magnetic.
All mass-energy in fields that travels far is electro-magnetic. Photons that
aren't virtual don't interact with other photons in the field and are the
fastest particle/wave in the universe known.
The other field in the Universe that is equally as quick as
photons in the electro-magnetic field is gravity. Gravity is attracted to mass
and has the speed characteristics of photons in an electro-magnetic field. So
one might think that gravity is related to the electro-magnetic field in some
way with gravitons being a dark photon that seeks to ground itself in mass.
If gravitons have a charge that locks itself into mass, that
charge might be related to the expansion of space. Gravity apparently is a local
phenomenon in the same way that electro-magnetic fields are. The wonder is that
there might not be a transcendent Universal field, though the concatenated
effects of localized gravity act universally in relation to matter.
https://van.physics.illinois.edu/qa/listing.php?id=2348&t=photons-as-carriers-of-the-electromagnetic-force
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