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Planck, Max Karl Ernst Ludwig

Born: 1858 AD
Died: 1947 AD

1858 – Born on April 23rd in Kiel, Germany. German physicist. The father of quantum theory and eponym of Planck’s constant.

1879 – Planck studied at the Universities of Munich and Berlin, where his teachers included Kirchhoff and Helmholtz, and received his doctorate of philosophy at Munich.

1880-1885 – He was Privatdozent in Munich.

1889 – Was a Associate Professor of Theoretical Physics at Kiel.

1894 – The Prussian Academy of Sciences appointed him a member.

1900 – He announced his derivation of the relationship: this was based on the revolutionary idea that the energy emitted by a resonator could only take on discrete values or quanta. The energy for a resonator of frequency v is hv where h is a universal constant, now called Planck’s constant.

1906 – His work is summarized in two books Thermodynamik (Thermodynamics) and Theorie der Wärmestrahlung (Theory of heat radiation).

1912 – Was the Prussian Academy of Sciences’ permanent secretary.

1926 – He was elected to Foreign Membership of the Royal Society.

1928 – Awarded the Society’s Copley Medal.

1937 – He became President of the Kaiser.

1944 – He suffered a personal tragedy when one of them was executed for his part in an unsuccessful attempt to assassinate Hitler.

1947 – Died on October 4th in Göttingen.