In 1896 – Hoping to test the suns ability to create X-rays. Henri Becquerel placed a wrapped photographic plate in a closed desk drawer, with a phosphorescent uranium rocks laid on top. He left it in the drawer for several days until the sun came out. To his surprise images of the rocks appeared without the sun.
In 1909 – The first successful color motion picture process, Kinemacolor, was shown to the general public at the Palace Theatre in London.
In 1935 – Scottish physicist Robert Watson-Watt demonstrated Radio Detection And Ranging to Air Ministry officials at Daventry, England. This RADAR proved quite helpful a few years later when war broke out.
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