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Hong Kong Teenagers and Televisions. Hong Kong Teenagers and Televisions
The goal of this essay is to demonstrate how television ...
... for Scotland) Fewer children and teenagers in the ... or renting the appropriate hardware —
televisions, DVD players, hi ... in the US, Russia, Belgium and Hong Kong. ...
Submitted by lonrlyman on February 15, 2006
Category: Science
Words: 1050 | Pages: 5
Views: 227
Popularity Rank: 52,639
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Hong Kong Teenagers and Televisions
The goal of this essay is to demonstrate how television has had an impact on the lives of people in Hong Kong. A conventional analog television is a device which decodes analog signals into sound and visual effects. Starting from the first black-and-white television in 1929 to the present color television or even HDTV, televisions are becoming part of our lives (Genova 2001). This essay focuses on discussing how televisions convey messages and alter the mind of teenagers. It begins by explaining the structure of a cathode ray tube and how it is applied to the working principle of a television. The essay then concentrates on showing how TV undermines moral standard through featuring violence and concludes by describing the cost of impact.
A cathode ray tube is the fundamental structure of all display devices, including televisions (Whitaker 2001).Cathode rays are streams of fast moving electrons emitted from a heated cathode (i.e. negative terminal) of a vacuum tube(Duncan 2001). Inside a cathode ray tube, a heated filament is connected to the cathode of an extra high tension (Whitaker 2001). Under this situation, the negative electrons are emitted from the filament surface, which are then focused by two pairs of deflection planes and accelerated by a positive anode (Duncan 2001). The resulting tight beam of cathode ray will hit a phosphorescent screen, which will glow when struck by the ray (Duncan 2001). Thus trace of input signals can be seen.
Inside a television, production of image is accomplished by similar operations, with the use of steering coils (Whitaker 2001). These coils can create magnetic fields according to input signals, which control the position of electron beam that hits the television screen (Whitaker 2001). The magnetic field is set to move the beam from left to right on a horizontal line (Whitaker 2001). After each sweep, the beam returns rapidly to the left side to start...
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