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CATHODE RAY TUBE (CRT) A television screen is a cathode ray tube, or CRT. So is a computer monitor. More Detailed Definition:
Abbreviation of cathode-ray tube is CRT, which is the technology used in most televisions and computer display screens. A CRT works by moving an electron beam back and forth across the back of the screen. Each time the beam makes a pass across the screen, it lights up phosphor dots on the inside of the glass tube, thereby illuminating the active portions of the screen. By drawing many such lines from the top to the bottom of the screen, it creates an entire screenful of images. |
