I heard that photon is its own antiparticle. If so, what is the different between these two photons
Photons also have their antiparticles, but antiphotons are photons themselves.
The following links will help you know the matter in details.
- A tunnel! Perfect for a game of Photons and Bosons. Game… (lesstraveledby.tumblr.com)
- Reblogg (geosciencebigpicture.com)