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Television

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by

Stacy Hamilton

on 29 April 2010

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Transcript of Television

What is technology?
. Television (TV) is a widely used telecommunication medium for transmitting and receiving moving images, either monochromatic ("black and white") or color, usually accompanied by sound. "Television" may also refer specifically to a television set, television programming or television transmission. A Look Back...



Philo Farnsworth was just a fourteen year old high school student when he came up with the idea that an electron beam could scan pictures back and forth & transmit them to remote screens - in other words, he thought up TV! While such an amazing invention could not be the work of one man alone, figures such as John Baird & Vladimir Zworykin deserve their due, Philo Farnsworth should be commended for his place in history We still have a long way to go before our home entertainment systems look like something out of Minority Report, but some of the new technologies are pretty impressive: 3D TV that approximates what you'd get in a movie theater, multiple monitors designed to present a wall-size picture, and ultra-definition resolution are just some of the innovations you can look forward to. A Look Into The Future.. Television has changed a lot over the years; from black & white tube sets to Technicolor consoles to plasma and LCD high-definition TVs. But the medium is still evolving. Tech companies are producing bigger (yet thinner) TV screens and immersive, customizable viewing experiences with Internet connectivity, widgets, and apps; & broadcasters are looking at ways to move beyond high-definition. Television is certainly one of the most influential forces of our time. Through the device called a television set or TV, you are able to receive news, sports, entertainment, information and commercials. The average American spends between two and five hours a day glued to "the tube" The Cathode Ray Tube:
It is even possible to make a television screen out of thousands of ordinary 60-watt light bulbs. You may have seen something like this at an outdoor event like a football game.
Almost all TVs in use today rely on a device known as the cathode ray tube, or CRT, to display their images. LCDs and plasma displays are sometimes seen, but they are still rare when compared to CRTs. A Look Today.. Electrons are negative. The anode is positive, so it attracts the electrons pouring off the cathode. In a TV's cathode ray tube, the stream of electrons is focused by a focusing anode into a tight beam and then accelerated by an accelerating anode. This tight, high-speed beam of electrons flies through the vacuum in the tube and hits the flat screen at the other end of the tube. This screen is coated with phosphor, which glows when struck by the beam. Technology is the branch of knowledge that deals with the creation and use of technical means and their interrelation with life, society, and the environment, drawing upon such subjects as industrial arts, engineering, applied science, and pure science. In its early stages of development, television employed a combination of optical, mechanical and electronic technologies to capture, transmit and display a visual image. By the late 1920s, however, those employing only optical and electronic technologies were being explored. The End.
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