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.
For this reason, he preferred the term social physics to sociology. The Development of the Discipline . The first book with the word sociology in its title was assembled in the 19th century by the English philosopher Herbert Spencer. In the United States, the first Sociology course was taught at the University of Kansas, Lawrence in 1890 under the title Elements of Sociology (the oldest continuing sociology course in America).