Ottawa Citizen

WHO WAS MAX PLANCK?

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Max Planck (1858 - 1947) was a German theoretica­l physicist who won the Nobel Prize for physics in 1918. He is credited as the founder of quantum theory — the physics of very small objects such as photons and electrons, which do not follow the rules of “classical” physics that apply to larger objects. By the end of the 1890s, he had realized that light and electromag­netic waves exist in a tiny unit that he called a quantum, which in turn had values based on multiples of a constant — now called Planck’s constant. His work relating energy and the frequency of radiation, in which Planck’s constant appears, was published in 1900. He was an immediate and influentia­l supporter of Einstein’s theory of general relativity when it was published in 1905.

The Max Planck Institutes, mostly in Germany, are named after him. There are 83 institutes in different fields.

Also named in full or in part after Planck are ...

Fokker–Planck equation Nernst–Planck equation Kelvin–Planck statement of the Second Law of Thermodyna­mics Massieu–Planck potentials Planck propositio­n, Planck statement Planckian locus Planck constant, Planck postulate Planck’s law of black body radiation Planck–Einstein relation Planck particle Planck units Planck energy Planck length Planck mass Planck time Planck temperatur­e Planck charge Derived Planck units Planck accelerati­on Planck current Planck power Planck density Planck epoch Planck particle Planck postulate Planck scale Trans-Planckian problem Planck’s principle Planck (crater) Max Planck Society, Planck Surveyor

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Max Planck

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