Template:Selected anniversaries/April 28: Difference between revisions
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||1999 – Rolf Landauer, German-American physicist and engineer (b. 1927) | ||1999 – Rolf Landauer, German-American physicist and engineer (b. 1927) | ||
||1999 – Arthur Leonard Schawlow, American physicist and academic, Nobel Prize laureate (b. 1921) | ||1999 – Arthur Leonard Schawlow, American physicist and academic, Nobel Prize laureate (b. 1921) Arthur Leonard Schawlow (May 5, 1921 – April 28, 1999) was an American physicist and co-inventor of the laser with Charles Townes. His central insight, which Townes overlooked, was the use of two mirrors as the resonant cavity to take MASER action to visible wavelengths. He shared the 1981 Nobel Prize in Physics with Nicolaas Bloembergen and Kai Siegbahn for his work on lasers. | ||
||2007 – Carl Friedrich von Weizsäcker, German physicist and philosopher (b. 1912) | ||2007 – Carl Friedrich von Weizsäcker, German physicist and philosopher (b. 1912) | ||
Revision as of 09:37, 29 October 2017
1402: Aztec philosopher, warrior, architect, poet, and ruler Nezahualcoyotl born. He will have an experience of an "Unknown, Unknowable Lord of Everywhere" to whom he will build an entirely empty temple in which no blood sacrifices of any kind will be allowed.
1774: Astronomer Francis Baily born. He will observe "Baily's beads" during an annular eclipse (1836).
1847: Mathematician Leopold Kronecker uses number theory to predict and prevent crimes against mathematical constants.
1868: Mathematician Georgy Voronoy born. He will invent what are today called Voronoi diagrams or Voronoi tessellations.
1928: Geologist and astronomer Eugene Merle Shoemaker born. Shoemaker will be the first scientist to conclude that Barringer Meteor Crater in Arizona, and similar craters, were caused by meteor impact.
1986: High levels of radiation resulting from the Chernobyl disaster are detected at a nuclear power plant in Sweden, leading Soviet authorities to publicly announce the accident.
1986: Celebrity time-traveller Radium Jane visits the stricken Chernobyl reactor, calls it "a waste of good fissionable material."
2017: New survey shows that Fantasy Voronoi diagram is more popular than Fantasy Football.