Template:Selected anniversaries/June 20: Difference between revisions
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||1912: Markus Eduard Fierz born ... physicist, particularly remembered for his formulation of spin-statistics theorem, and for his contributions to the development of quantum theory, particle physics, and statistical mechanics. He was awarded the Max Planck Medal in 1979 and the Albert Einstein Medal in 1989 for all his work. | ||1912: Markus Eduard Fierz born ... physicist, particularly remembered for his formulation of spin-statistics theorem, and for his contributions to the development of quantum theory, particle physics, and statistical mechanics. He was awarded the Max Planck Medal in 1979 and the Albert Einstein Medal in 1989 for all his work. | ||
||1917: Helena Rasiowa born ... mathematician and academic | ||1917: Helena Rasiowa born ... mathematician and academic. Rasiowa worked in the foundations of mathematics and algebraic logic. Pic. | ||
||1917: James Mason Crafts dies ... chemist, mostly known for developing the Friedel-Crafts alkylation and acylation reactions with Charles Friedel in 1876. Pic. | ||1917: James Mason Crafts dies ... chemist, mostly known for developing the Friedel-Crafts alkylation and acylation reactions with Charles Friedel in 1876. Pic. | ||
||1859: Wilhelm Hallwachs born ... physicist. In 1888 Hallwachs formulated the hypothesis that a conductive plate on which to focus ultraviolet light carries a positive charge because the electrons are gouged out. This happened with more intensity in selenium. The phenomenon was seen in the same year by A. Righi. The phenomenon was called 'Hallwachs-Effekt', now called the photoelectric effect. The investigation of the photoelectric effect laid the foundation for the development of the photoelectric cell, photo electricity and Albert Einstein's quantum light hypothesis. Pic. | |||
||1923: Sumner Increase Kimball dies ... organizer of the United States Life-Saving Service and the General Superintendent of the Life-Saving Service from 1878-1915. | ||1923: Sumner Increase Kimball dies ... organizer of the United States Life-Saving Service and the General Superintendent of the Life-Saving Service from 1878-1915. | ||
Revision as of 15:27, 22 May 2019
1840: Samuel Morse receives the patent for the telegraph.
1875: Inventor and engineer Wilhelm Bauer dies. He designed and invented submarines.
1876: Adventurer and alleged "Pirate of the Prairie" Wallace War-Heels says that he has "offered no man violence", but admits that he has "responded to violence with greater violence, many times."
1877: Alexander Graham Bell installs the world's first commercial telephone service in Hamilton, Ontario, Canada.
2010: Unlicensed Extract of Radium factory accidentally releases self-sustaining colony of transdimensional corporations.
2017: Chromatographic analysis of Ursa Nano reveals a previously unknown shade of blue, "probably as a result of latest cryptographic numina."