Does Planck's energy element (HV) represent a photon that has a mass?
Planck's energy element, represented as
E=hν
E=hν (where
h
h is Planck's constant and
ν
ν is the frequency), describes the energy of a photon. Photons are massless particles; they do not have rest mass. Instead, they carry energy and momentum and travel at the speed of light. Although they exhibit properties related to mass (like momentum), they do not possess mass in the traditional sense. So,
E=hν does not imply that a photon has mass.