High Quality Content by WIKIPEDIA articles! The neutrino theory of light is the proposal that the photon is a composite particle formed of a neutrino-antineutrino pair. It is based on the idea that emission and absorption of a photon corresponds to the creation and annihilation of a particle-antiparticle pair. The neutrino theory of light is not currently accepted as part of mainstream physics, as according to the standard model the photon is an elementary particle, a gauge boson.