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.
11 photos: 'One small step': Artifacts of the moon landing. 'One small step': Artifacts of the moon landing â This spacesuit was worn by astronaut Neil Armstrong, commander of the Apollo 11 mission, which landed the first man on the moon on July 20, 1969.he moon landing was watched by an estimated 600 million people around the world. Facts: July 20, 1969 - [4:17 pm EDT] Apollo 11 becomes the first manned spacecraft to land on the moon. Neil Armstrong (commander), Buzz Aldrin (lunar module pilot) and Michael Collins (command module pilot) were the crew.