How does a TV (Television) work???
(oh yea, plz no one writting, really you need it ASAP, so if you were about to do it well don’t evn think about it!!!)
Favorite Answer
http://www.howstuffworks.com/tv.htm
Television (often abbreviated to TV, T.V.; sometimes called the tube, or telly in the UK and Australia) is a widely used telecommunication system for broadcasting and receiving moving pictures and sound over a distance. The term may also be used to refer specifically to a television set, programming or television transmission. The word is derived from mixed Latin and Greek roots, meaning “far sight”: Greek Ïá¿Î»Îµ “tele”, far, and Latin vision, sight (from video, vis- to see).
Since it first became commercially available from the late 1930s, the television set has become a common household communications device in homes and institutions, particularly in the first world, as a source of entertainment and news. Since the 1970s, video recordings on VCR tapes and later, digital playback systems such as DVDs, have enabled the television to be used to view recorded movies and other programs.
A television system may be made up of multiple components, so a screen which lacks an internal tuner to receive the broadcast signals is called a monitor rather than a television. A television may be built to receive different broadcast or video formats.
In a television camera, a picture is focused on a special kind of glass vacuum tube. The TV camera records pictures on a grid of tens of thousands of tiny picture pieces or pixels at the back of the tube. Each pixel is a light-to-electricity converter. It measures the amount of light at that spot and converts the measurement into an electrical signal. The camera sends pixel measurements out one by one to be amplified and broadcast, just like sound signals in radio.
The television receiver in your home gets these signals and reassembles the picture. The heart of the TV is the picture tube, or screen, which is divided up into tiny pixels (you can see these if you look very closely at your TV when it is on). The signals control an electron gun, which shoots electrons toward you. The electrons are stopped by the glass of the tube, which is coated with special chemicals (phosphors) that glow when hit with electrons. The gun sweeps across the back of the screen, hitting each phosphor pixel in turn, row by row, until it has covered the whole screen. The power of the electron beam is controlled by the incoming signal, so each pixel receives a shot of energy that tells it how much to glow. This happens so fast that it looks like you’re watching one continuous picture. In fact, you’re watching a series of still images. If the original image was dark in one spot, the pixel on your TV screen will not receive much power from the electron beam, and it will be dark. If the original spot was very bright, that pixel on your screen will be bright, too.
Broadcast TV sound is just like radio. In fact, a TV picture is broadcast as AM and its sound is broadcast as FM at the same time. Your TV can tell which is which, and handles each signal separately.
