![]() But having said that, I don't consider the radiation dose even at a distance of just one metre to be dangerous. The cathode ray tube (CRT) is a vacuum tube containing a so-called electron gun (or three for a color television) and a fluorescent screen where the television image is displayed. Emits radiation: CRT televisions emit a low level of radiation, though this. A 14-inch cathode ray tube showing its deflection coils and electron guns. I could not say that they're safer because I don't consider the radiation from cathode ray tubes to be a risk, but I can say that they give off less radiation.Īs far as sitting too close to the television goes, the further back you are, the lower the radiation dose will be. The CRT (Cathode Ray Tube) television is a type of display device that dates. LCD and plasma screens don't give off any radiation at all. So it's something that we can measure, but it's not something that's harmful. It's not enough to be dangerous and, in fact, if you watch your television for several hours a day all year, you're getting less radiation than you would from a single medical x-ray and less radiation than you get from the radioactivity that's just naturally within your body. Cathode ray, stream of electrons leaving the negative electrode (cathode) in a discharge tube containing a gas at low pressure, or electrons emitted by a. VDT contains a large evacuated glass tube, called a cathode ray tube (CRT). Now, having said that, I've got to emphasise, they're low doses of radiation. The basic principle of operation of a VDT is similar to that of a television set. Today, modern computers displays and televisions (TVs) today use liquid crystal display (LCD), Light-emitting diodes (LED), plasma, or other technologies that do not contain cathode ray tubes. So, if you're sitting close to a cathode ray tube, whether a computer monitor, a television screen, a radar set or anything else with that type of technology, you're going to be getting low doses of x-ray radiation. ![]() This is the same way that x-rays are produced in regular x-ray tubes. Cathode Ray Tube (CRT) TVs consisting of an electron gun, vacuum tube, and phosphorescent screen. The screen is covered with a phosphorescent coating (often transition metals or rare earth elements ), which emits visible light when excited by high-energy. What happens is that anything with a cathode ray tube, a tube where you shoot high-energy electrons at some sort of screen, when those electrons hit the screen, they give off very low energy x-ray radiation. The cathode rays are now known to be a beam of electrons emitted from a heated cathode inside a vacuum tube and accelerated by a potential difference between this cathode and an anode. But, having said that, it's only a little bit of radiation and it's not that dangerous. Andy - Televisions really do give off radiation.
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