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Google’s Logo Today May 16th 2008
Published by admin on May 16th, 2008 | Tagged Other Stuff
Did you notice that Google’s logo looks like this:
It was exactly today on May 16th 1960, when Theodore Maiman invented Lasers. Read more about it on Wikipedia pages about Laser.
Historically,
Foundations
In 1917 Albert Einstein, in his paper Zur Quantentheorie der Strahlung (On the Quantum Theory of Radiation), laid the foundation for the invention of the laser and its predecessor, the maser, in a ground-breaking rederivation of Max Planck’s law of radiation based on the concepts of probability coefficients (later to be termed ‘Einstein coefficients’) for the absorption, spontaneous, and stimulated emission.
In 1928, Rudolph W. Landenburg confirmed the existence of stimulated emission and negative absorption.[5] In 1939, Valentin A. Fabrikant (USSR) predicted the use of stimulated emission to amplify “short” waves.[6]
In 1947, Willis E. Lamb and R. C. Retherford found apparent stimulated emission in hydrogen spectra and made the first demonstration of stimulated emission.[7]
In 1950, Alfred Kastler (Nobel Prize for Physics 1966) proposed the method of optical pumping, which was experimentally confirmed by Brossel, Kastler and Winter two years later.[8]
[The first page of Gordon Gould's laser notebook in which he coined the acronym LASER and described the essential elements for constructing one.]
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