On October 3, 1947, German physicist Planck died. On October 3, 1947, German physicist Planck died. In 1900, Professor Planck of the University of Berlin first proposed the Quantum Theory. On December 14, 1946, Planck published a paper in the Physical Society of Berlin entitled The Theory of the Equal Distribution of Energy in the Normal Spectrum. On October 19, 1947, Planck published a paper entitled The Theory of the Equal Distribution of Energy in the Normal Spectrum, and proposed the famous Planck formula, which was widely regarded as the day of the birth of Quantum Physics. Early in 1895, Planck began his research on the Theory of the Equal Distribution of Energy in the Normal Spectrum. On October 19, 1948, Planck published a paper entitled Theory of the Equal Distribution of Energy in the Normal Spectrum.