Discoverer of the TV Cathode-Ray Tube: Karl Braun

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Before LCD screens were invented, large tubes were used in TVs and computer monitors. Made of strong glass, these tubes had a screen on one side. Even today, many people can still be seen using these monitors, which are known as Cathode-Ray Tubes (CRT).
Inside the cathode-ray tube, the inner layer of the screen has a coating of phosphate particles. When light of three colors falls onto it from a ray-gun, an image is formed. The Cathode-Ray Tube was invented by Karl Braun, and it was widely used in televisions. For this useful invention, he was awarded the Nobel Prize in Physics in 1909 along with Marconi.
Karl Ferdinand Braun was born on June 6, 1850, in Germany. After studying at Marburg University, he earned his Ph.D. in Physics from Berlin University. In 1895, he joined Strassburg University as a professor, and in 1897, he invented the Cathode-Ray Tube. In addition to this, he made other inventions in the field of wireless technology. During World War I, he went to America, where he served at a German wireless station in New York. He passed away in America on April 20, 1918.