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    • bob de builder
    • March 12th, 2017 7:41pm

    How fast is a jiffy?
    Fast forward about a century and a half later and famed Physical Chemist Gilbert Newton Lewis, who incidentally came up with the word ‘photon’, suggested a ‘jiffy’ should be officially defined as the time it takes for light to travel one centimeter in a vacuum (about 33.3564 picoseconds).May 3, 2012

    • amen
    • July 5th, 2017 7:45pm

    how long will we wait.can we see it this year