Johannes Stark (April 15th 1874, June 21st 1957) was a German Physicien which accepted the Nobel Prize of physics in 1919.

Born with Schickenhof in Bavaria, Stark made its studies with the Gymnasium of Bayreuth and later with Ratisbon. It began its academic works with the Université of Munich, where it studied physics, the Mathématiques, the Chimie and the Cristallographie.

It supported its Doctorat on a subject of physics of Isaac Newton.

He worked in various stations at the institute of physics until in 1900, where he became nonpaid professor with the Université of Göttingen. He worked in the departments of physics of several universities, of which the Université of Greifswald, until in 1922. In 1919, it received the Nobel Prize of physics for its discovered Doppler effect and unfolding of the spectral lines by the electric fields (this last effect is known under the name of Effet Stark).

Of 1933 to its retirement in 1939, Stark was elected president of the physico-technological Institut, and also president of the Deutsche Forschungsgemeinschaft. Stark published more than 300 articles, mainly on the electricity. It received various rewards of which the Nobel Prize, the price of Baumgartner of the Academy of Science of Vienna (1910), the price of Vahlbruch of the Academy of Science of Göttingen (1914), and the medal of Matteucci of the academy of Rome. He married with Luise Uepler, and they had five children.

During the mode Nazi, it tried (with Philipp Lenard) to become Führer German physics Deutsche Physik ( Aryan physics ), movement against Jewish physics of Albert Einstein and Werner Heisenberg.