Max Karl Ernst Ludwig Planck (1858 - 1947) was a German physicist who was of the first people to contribute to the invention of quantum theory. After studying physics at Munchen University, he moved to Berlin where, in 1889, Planck discovered a new fundamental constant (h), which is named Planck's constant. It is, among other things, used to calculate the energy of a photon, which are energy atoms. His discoveries showed that in addition to the atomistic structure of matter, energy also possesses an atomistic structure, which is governed by the universal constant h.
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