Assertion: photon | /r/HasAspect | zero rest
Facets:
Source sentences:
text: Because photons have zero rest mass, no wave function defined for a photon can have all the properties familiar from wave functions in non-relativistic quantum mechanics.[g]
text: The effects of this force are easily observable at both the microscopic and macroscopic level, because the photon has zero rest mass; this allows long distance interactions.