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LIGHT and ASTRONOMY


    Light: What IS it?
      Book says: ``Radiant Energy''



    It's really an amazing thing!

      Travels without any medium

      Travels very fast     (``c'' = 300,000 km/s)

        Moon to earth in ONE SECOND!

        Earth to Sun ?

        Outer Solar System ?



    Comes in a variety of Flavors:

    • Gamma-Rays
    • X-Rays
    • Ultra-violet
    • Optical
    • Infrared
    • Radio