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  1. Refraction and diffraction, the visible light spectrum, prism investigations, ray diagrams explained. Electromagnetic spectrum, sources, types, properties, uses (including medical) and dangers. A bsorption & emission of radiation by materials - temperature & surface factors including global warming.

  2. en.wikipedia.org › wiki › Emmett_BrownEmmett Brown - Wikipedia

    1885 , 1931, 1955, 1985, 1985A, 2015, 2015A. Emmett Lathrop Brown, Ph.D., commonly referred to as " Doc Brown ", is a fictional scientist character in the Back to the Future franchise. In the world of the franchise, he is the inventor of the world's first and second time machines, the first (counting in order of his personal chronology ...

  3. Oct 21, 2015 · Here are some of the details behind Doc Browns breakthrough technology: The key to time travel is the flux capacitor. The capacitor was designed by Doc Brown in October 1955 and was...

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