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Its a good sum up about television and its history and afffects on society Great work more diagrams needed The Development of the Television Television our link to the changing world around us Once thought to be just a passing phase through a quickly advancing society but now a common innovation in every household Since the l940s television has become the window on the world for much of industrialized society Anything the eye can see may be brought to the little screens in living rooms bedrooms and kitchens What comes through the window however does not always please everyone Television has been called a vast wastelandCheney 14 by Newton Minow the Federal Communications Commission chairman under US President John F Kennedy and now many question the limits television has with respect to the vulgarity exhibited If television has persisted in offering mindless entertainment it has also frequently rewarded viewers with outstanding presentations in drama documentary and the arts and it has made such programming available to millions of people across the globe HISTORY OF TELEVISION TECHNOLOGY The events leading to television began in 1817 when a Swedish chemist named Jons Jakob Berzelius discovered the chemical element selenium Later it was found that the amount of electrical current that selenium could carry depended on the amount of light that struck it This property is called photoconductivity The discovery led an American inventor GR Carey to make the first crude television system using photoelectric cells In 1875 he constructed a panel of photoelectric cells with many of them side by side Each cell was connected by a wire to a corresponding electric light bulb in a panel As an object was focused through a lens onto the panel of photoelectric cells each cell controlled the amount of electricity it passed on to its corresponding light bulb Unclear outlines of the object projected onto the photoelectric cells then showed in the lights on the panel
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