Word: ultraviolet
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...studied at Johns Hopkins and at the University of Berlin, had finally settled himself into his life's work in Baltimore. The field that interested him most at the time was the problem of light. He wrote more than 250 technical papers, developed a way to photograph with ultraviolet rays, pioneered in the study of infrared. He built the largest spectroscope in the world, and his work with diffraction gratings, which could divide the spectrum into 1,000 shades, revolutionized much of astronomy and physics research. His Physical Optics became the classic work in the field; his experiments achieved...
...meet conditions on the surface of the earth, where the temperature varies only slightly and the pull of gravitation varies hardly at all. The atmosphere provides a steady supply of oxygen, while its cushioning bulk over head protects man's delicate hide from nearly all meteors and ultraviolet, X and cosmic rays. For man to leave this sheltered environment is as difficult as it was for his fishlike forerunners to slither up on to dry land...
...aeropause. To compress the thin outside air to breathable density and dissipate the heat of compression would take heavy machinery, and the air so gathered might not be fit to breathe. At 100,000 ft. it contains enough ozone, formed out of oxygen by the sun's ultraviolet light, to poison crewmen. Probably the air they breathe will have to be "bottled...
...thing, fluorochemicals are unusually stable. Unlike the organic chemicals, which are often inflammable or explosive, they resist decomposition by heat, chemical reagents or ultraviolet light. They are not attacked by bacteria or fungi. Some of them are very strong acids, others are so inert that they make fine fire extinguishers...
...began in the spring of 1950: five cases cropped up, caught hold, and multiplied with raging speed. By winter, 1,459 schoolchildren had infected scalps, and the Soo was in the midst of the worst ringworm epidemic ever recorded north of the Rio Grande. Itching heads were thrust under ultraviolet lamps to make the disease show up, shaved, scrubbed, treated with salves, and encased in sterile white cotton caps to prevent spreading. Doctors tried new drugs by the score. Special X-ray clinics were set up, and skilled radiologists were brought in to treat the itchy youngsters...