Assertion: photon | /r/HasProperty | its own antiparticle
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Source sentences:
text: The photon is its own antiparticle.
text: For instance, the muon and the anti-muon could transform into a photon and a second photon (remember, the photon is its own anti-particle.)
text: Photons are stable and are their own antiparticle.
text: + e^-[/itex].And to answer the obvious follow-up question, "If photons are their own anti-particles and can annihilate against each other, why doesn't it happen all the time?
text: Seen another way, the photon can be considered as its own antiparticle (thus an "antiphoton" is simply a normal photon).