In 1896 – Hoping to test the sun’s ability to create X-rays, Henri Becquerel placed a wrapped photographic plate in a closed desk drawer, with phosphorescent uranium rocks laid on top. He left it in the drawer for several days until the sun came out. It was cloudy.
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.