ABSTRACT
Classical mechanics has been extremely successful in explaining quite a number of phenomena involving the motion of bodies from the scale of a small object with the mass of a fraction of gram, to the scale of planets revolving around the Sun. Newton's laws plus Maxwell's equation were what was needed to explain almost all the known phenomena at the beginning of the twentieth century. Physicists at the end of the nineteenth century and beginning of twentieth century started to receive good experimental data about blackbody radiation. The calculation is therefore done in two steps: counting the modes per frequency interval and assigning the proper energy to each mode. The physics of oscillators coupled to e.m. waves was clearly solid: Maxwell's equation are still valid today. The physics of oscillators coupled to e.m. waves was clearly solid: Maxwell's equation are still valid today.
