where m e = 9.1093826 × 10 -31 kg is the mass of the electron. Temperature has been highlighted to be connected to the energy scale. In thermodynamic equilibrium, following the Planck and Einstein results on the analysis of black body radiation, a well known distribution of the photons among the various quantum states with definite values of the oscillation frequency ν corresponds to a a defined temperature T . The average frequency grows proportionally to the temperature as ν = k B T /h. But, the periodic time of oscillation τ is inversely proportional to the frequency, such that: