Word: ultraviolet
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...suit was well-insulated and covered with a white material to reflect all possible sunlight, for maintaining tolerable temperatures is one of the major problems in the design of space suits. Because sunlight in space is twice as strong as at the bottom of the atmosphere, and contains ultraviolet rays that quickly weaken many materials, the outer layer of a space suit must not only ward off light and heal, but must be proof against ultraviolet...
Actually, snow blindess is not blindness and isn't caused by snow. Correctly called solar photophthalmia, it is sunburn of the sun's ultraviolet rays off the glistening snow or ice. While generally affecting the unprepared skier, snow blindness is not unknown among mountain climbers, the Eskimos, and even polar bears...
...ordinary-looking stars could produce large quantities of radio waves. But they made no progress, and two years ago Dr. Schmidt made things worse. With Dr. Jesse Greenstein, Schmidt photographed the spectra of four of the radio-loud "stars" with the 200-in. Palomar telescope and found evidence of ultraviolet light that had increased in wave length until it became visible light...
Actually, snow blindness is not blindness and isn't caused by snow. Correctly called solar photophthalmia, it is sunburn of the sun's ultraviolet rays off the glistening snow or ice. While generally affecting the unprepared skier, snow blindness is not unknown among mountain climbers, the Eskimos, and even polar bears...
Quality sunglasses or dark goggles are the best safeguards against snow blindness for the skier planning any length of time in the sun. Darker or neutral gray lenses with a light transmission averaging 20 per cent will screen the potentially-harmful ultraviolet rays. For safety make, these lenses should be of shatter-resistant safety glass or plastic. Tinted eyewear of ordinary glass offer an additional hazard to the eyes of a skier who falls or grases a tree limb on a downhill...