[[Image:Max planck.jpg|right|thumb|150px|Max Planck]]
'''Max Planck''' (1858-1947) was
one of great [[Germany|German]] physicists. He advanced the subject of [[thermodynamics]], [[thermoelectricity]], the theory of [[dilute solutions]], and was one of the founders of [[quantum mechanics]].
Planck's revolutionary discovery, one of the most influential in all of science, was that
energy emitted by a resonator could on have discrete values or quanta. The energy for a resonator of frequency '''''ν''''' is '''''hν''''', where "'''''h'''''" is a universal constant that is now called Planck's constant. This theory explained discrepancies between theory and observations, and became known as quantum theory. This helped lay a foundation for the future discovery of quantum mechanics.
Planck was award the [[Nobel Prize]] for physics in 1918.<ref>The Earth and Its Peoples A Global History, Bulliet et al, 2005</ref>