Calculating Blackbody Radiance v2

In 1900, Max Planck developed the modern theory describing the radiation field of a blackbody. At the time, there were two distinct models for blackbody radiation: the Rayleigh-Jeans law, which fit the measurements well at low frequencies, and Wien’s law, which worked well at high frequencies, but neither worked everywhere. Planck, by making the ingenious assumption that the energy of the modes of the electromagnetic field must be quantized, developed the theory that fits observations at all parts of the spectrum. This leap marked the birth of quantum mechanics and modern physics.