UVC light is mostly absorbed by the Earth's atmosphere, but it is even more dangerous. Artificial UVC light can pass through the outer layer of skin and eye cells to ___95___ the living cells underneath. ___...
The director of the Center of Radiological Research at Columbia University has been studying UV light as a potential life-saving weapon against the virus. Brenner found out that a narrow band of UV light called far-UVC light cannot penetrate skin living cells. “That’s why it’s safe f...
Objects, like bits of old space rockets or satellites, move around the planet at very high speeds, so fast that even a very small piece can break important satellites or become dangerous to people, particularly astronauts. If the tiniest piece of junk crashed into a spacecraft, it could dama...
Heavy Weight Lifting Is Dangerous for Some People.Reports on a study by Yale University researchers which revealed the health risk of heavy weight lifting for people with certain medical conditions.EBSCO_bspWall Street Journal - Eastern Edition...
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The human body emits invisible infra-red light at 37 °C. 蜡烛火焰可以基本上被视为黑体辐射现象(尽管主要是烟灰,也就是火焰内部的炭黑细碳粒,作为黑体来辐射)。当蜡烛中燃料的“灰尘颗粒”被加热到1000-1400℃时,这些颗粒开始产生电磁辐射,因此我们习惯看到的熟悉的黄橙色。
UV rays are especially dangerous for those who already have compromised eyesight from cataract surgery or other factors. They can cause more damage than ever before because the retina has been weakened by age-related changes like the yellowing of lens tissue (yellowing occurs naturally over time)....
Something dangerous Killing your own food is one thing – what about food that can kill you? Cheating death can be hungry work, so head to Japan and have fugu, or pufferfish, which contains a poison 1,200 times deadlier than cyanide. ...
UV Disinfection -- UV disinfection destroys parasites, bacteria and viruses with ultraviolet light. It doesn't remove other contaminants like metals or chemicals from water. UV is often found in point-of-use, under-sink systems. All of these methods can be effective at purifying water, but tha...
not dangerous but it can be very distressing. It could affect small areas on the hands or face, or for some people much larger areas across the whole body. Steroidal treatment is often prescribed, although treatment with UV lights and creams to even out the pigmentation can also be effective...