If this correlation is correct, then sitting further away would reduce the level of harmful light exposure that could damage eyesight. Most recently, researchers are looking at whether there is a link between the elevated levels of blue light emitted from LEDs and increasing rates of age-related macular degeneration. So, are we now safe to sit close to televisions and computers? You might be safe from radiation, but other risks arise with the prevalence of LEDs and similar technology. The cathode ray tube was a scientific curiosity discovered in the late 19th century, and a mainstay of display technology in the late 20th. These televisions were ultimately recalled in 1967 but the stigma of sitting too close to the television persists today. The levels of radiation were so high that they ranged from 10 – 100,000 times of what was considered acceptable, even back in the 1960s. The rays went from the cathode to the anode, but a narrow beam continued through the hole in the anode to the glass. The cathode was at the far narrow end of the tube, the anode a few centimeters away, with a small hole in its center. failed to properly shield these old televisions resulting in high levels of radiation reaching viewers. He achieved this with a specially designed cathode ray tube, the precursor of the tube in a present-day TV set. Unfortunately, for reasons never explained, G.E. It was well known at the time that radiation could be contained with lead shielding. These more powerful electrons brought with them high levels of x-ray radiation. Importantly, the color television technology at the time required much more powerful electrons than the black and white variety. Although modern cathode-ray tubes used in televisions and computer displays. These X-rays are produced when electrons are rapidly decelerated as they strike the phosphor. It worked by shooting electrons from the CRT into the phosphor coating on the screen that would then light up when excited by this energy. With the significant advances in the development of display technology of television, Cathode Ray Tube (CRT) monitor was displaced by Liquid Crystal Display. CRTs can emit a small amount of X-ray radiation as a result of the electron. But the highest energetic radiation emitted from (CRT) is X-rays. Envelopes for television cathode-ray tubes have traditionally been rectangular, of. CRT material and process technologies are common to the vacuum tube industry as a whole, which continues to serve many applications across a wide variety of industries. It was a technological breakthrough at the time. The amount of x-radiation generated within the cathode-ray tube can be. Back in the 1960s, General Electric released a special cathode ray tube (“CRT”) television capable of displaying colors.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |