photons sir, photons. Waves of particles, so therefore, both.
Thanks Keetr! Now for a follow up question: Does your answer mean that the light waves act similar to a carrier wave for the particles? Thanks for your answer in advance :-)
The technical aspect of this is deep in debate. But the short answer is, light acts as both a particle and a wave. It's one of those mysteries of science that still is not completely figured out. If anyone claims that it is one or the other, call them a liar. It was decided 80 years that it was a wave, but even that was overturned just a few short years ago.
If you want to look into it further, the name that they gave the action is 'Duality'.
it is both of them just like any other light