In particular, the energy of a photon equals Planck's constant times the frequency of the radiation. Mathematically, this is given by the equation E = hf. Planck's constant is the fundamental constant of quantum theory that determines the scale of the small-scale world.lanck's constant = 6.63 * 10^-34 joule-second (J-s). The total energy in an electromagnetic wave is the sum of the energies of each photon in the wave. The energy of a photon is so small that we usually measure it in electronvolts (eV). One eV is the potential energy of each electron in a 1-volt battery.
A social revolution inevitably encounters an obstacle in the form of the political power of the ruling class. Hence, the first act of a social revolution is political revolution, the attainment of state power by the revolutionary class.
V. I. Lenin distinguished three historical epochs in the development of the bourgeoisie as a class. The first (to 1871) was the epoch of the rise and formation of the bourgeoisie, âthe epoch of the rise of the bourgeoisie, of its triumphâ (Poln. sobr. soch., 5th ed., vol. 26, p. 143).