Mechanics / Electrodynamics
March 12, 2016
Photon down conversion, photon rest mass, particle physics
The photon has several properties that distinguish it from all other subatomic particles. It is the only elementary particle wherein a high energy photon can split up into two or more low energy photons (down conversion) and vice versa (up conversion). This transformation conforms to the laws of conservation of momentum and of energy. Down conversion implies that as per the law of conservation of mass, a high frequency photon should have more rest mass or invariant mass than a low frequency photon.