Part 1 of Essay
In 1854, John Tyndall demonstrated to the Royal Society that light could be conducted through a curved stream of water, proving that a light signal could be bent. In 1880, Alexander Graham Bell invented his "Photo phone" which transmitted a voice signal on a beam of light. Bell focused sunlight with a mirror and then tal ....

Part 2 of Essay
.... 1895, french engineer Henry Saint-Rene designed a system of bent glass rods for guiding light images in an attempt at early television. In 1898, American David Smith applied for a patent on a bent glass rod device to be used as a surgical lamp. In the 1920's, Englishmen John Logie Baird and American Clarence W. Hansell patented the idea of using arrays of transparent rods to transmit images for television and facsimiles respectively. In 1930, German medical student, Heinrich Lamm was the first person to a ....