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Television

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Submitted By dreadedwolf
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I did this to make an account Television is a telecommunication medium that is used for transmitting and receiving moving images and sound. Television can transmit images that are monochrome, in color, or in three dimensions. The word television comes . Television may also refer specifically to a television set, television program, or television transmission.
First commercially available in very crude form on an experimental basis in the late 1920s, then popularized in greatly improved form shortly after World War II, the television set has become commonplace in homes, businesses, and institutions, particularly as a vehicle for entertainment, advertising, and news. During the 1950s, television became the primary medium for molding public opinion. The replacement of bulky, high-voltage cathode ray tube screen displays with compact, energy-efficient, flat-panel alternatives such as LCDs, plasma displays, and OLED displays was a major hardware revolution that began penetrating the consumer computer monitor market in the late 1990s and soon spread to TV sets. In 2013, 87% of televisions sold had color LCD screens.
The most common usage of television is for broadcast television, which is modeled on the radio broadcasting systems developed in the 1920s. Broadcast television uses high-powered radio-frequency transmitters to broadcast the television signal to individual television receivers. The broadcast television system is typically disseminated via radio transmissions on designated channels in the 54–890 MHz frequency band. Signals are often transmitted with stereo or surround sound in many countries. Until the 2000s, broadcast television programs were generally transmitted as an analog television signal, but over the course of the following decade, several countries went almost exclusively digital. In addition to over-the-air transmission, television signals are

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