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Television!

Television! . By: Brittney townsend 7 th grade 2 nd block. Just to start off!. The history of television records the work of numerous engineers and inventors in several countries over many decades. Questions to be answered!. Who invented the television?

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Television!

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  1. Television! By: Brittney townsend 7th grade 2nd block

  2. Just to start off! The history of television records the work of numerous engineers and inventors in several countries over many decades.

  3. Questions to be answered! • Who invented the television? • What affect did the television do to others? • When was the television made(invented)? • Where was the television made(invented)? • How/Why was the television made(invented)?

  4. The beginning… • The beginnings of the mechanical television can be tracked back to the discovery of the photoconductivity of the element selenium by Willoughby Smith in 1873, the invention of a scanning disk by Paul Nipkow in 1884.

  5. Who invented the television? • As a 23-year-old German University student, Paul Nipkow proposed and patented the first system, electromechanical television system in 1884.

  6. HMMM, I WONDER! • Television affected the world, such as helping people showing them a whole new environment, helping them get a better view of things around the world and to watch it instead of hearing it over the radio. Question #2 Answered!

  7. 1876 • Boston civil servant George Carey was thinking about complete television systems and in 1877 he put forward drawings for what he called a selenium camera that would allow people to see by electricity.

  8. 1880 • Inventors Alexander Graham Bell and Thomas Edison theorize about the telephone devices that transmit images as well as sound. • Bell’s photophone used light to transmit sound and he wanted to advance his device for image sending. • George Carey builds a rudimentary system with light-sensitive cells.

  9. 1881 • Sheldon Bidwell experiments with his Telephotography that was similar to Bell’s photophone.

  10. 1884 • Paul Nipkow sends images over wires using a rotating metal disk technology calling it the electric telescope with the 18 lines of resolution

  11. 1900’s • At the World’s Fair in Paris, the first International Congress of Electricity was heldon August25 1900. • However it was not until 1907 that developments in amplification tube technology, by Lee Deforest and Arthur Kornamong others, that made the design practical.

  12. 1911 • In 1911, Boris Rosing and his student Vladimir Zworykin created a television system that used a mechanical mirror-drum scanner to transmit, in Zworykin’s words, “ very crude images” over wires to the “Braun tube”.

  13. 1925 • On March 15, 1925, Scottish inventor John Logie Baird gave the first public demonstration of televised silhouette images in motion.

  14. 1926 • On December 25, 1926 KenjiroTakayanagi demonstrated a television system with a 40-line resolution that displayed a CRT display.

  15. Mechanical scanning systems, though obsolete for the more familiar television systems, nevertheless survive in long wave infrared cameras because there is no suitable all-electronic pickup device..

  16. THE END

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