Word: waving
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Dates: during 1930-1939
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...particles in the vast dust cloud of the Orion Nebula. In this case the particles scatter the blue and yellow-green components of the light of stars in the cloud, letting only long infra-red rays filter through. Hence the stars appear much redder than normal. The wave lengths Baade & Minkowski recorded convinced them that the dust grains in the nebula were about .000004 inch in diameter...
...Small particles like dust, fortuitous aggregations of molecules and droplets of water tend to deflect short wave lengths of light which approximately "fit" them, while longer wave lengths curl around these small obstacles. Long infra-red rays go farther through fog than visible light and still longer radio waves can go through buildings. In the visible spectrum, blue light is shorter in wave length than red. In the case of the evening sun, the blue components are scattered in all directions, and this subtraction makes the sun look red. But the blue light is scattered again & again in the atmosphere...
Chicago's Northwestern University last week announced successful tests of a "sunburnometer," a recording device to measure the intensity of the ultraviolet component of the sun's light which causes sunburn. The sunburn-causing wave lengths can be considered as the "health band" in the solar spectrum, mainly because it contains the still narrower band which produces vitamin D in the skin. Developed by Professors Walter S. Huxford and Robert Cashman, the "sunburnometer" is noi sensitive to visible light or to the short radiation on the other side of the sunburn band. It may also be used...
...part of the nation's radio plant and run it to suit themselves. Director Levering Tyson of the Rockefeller-endowed National Advisory Council on Radio in Education had warned the 500 educators invited to the Conference that "any discussion of such controversial subjects as the allocations of wave lengths will be scrupulously avoided." Two years ago Congress overwhelmingly rejected the Fess and Wagner-Hatfield bills calling for a definite allocation of wave bands for educational purposes. Last week more cold water was thrown on that hope when Chief Engineer T. A. M. Craven of the Federal Communications Commission flatly...
Promptly quashed by Federal engineers was the dream of many a delegate that short-wave reception might offer a solution to their hunger for additional radio time. The short-wave bands open to present day receivers are relatively narrow, and largely assigned to commercial operators. President William Mather Lewis of Lafayette College described the only U. S. short-wave station that is non-commercial and non-profit-making, Boston's WIXAL. Founded by Engineer Walter S. Lemmon, who shyly refused last week to make a speech, WIXAL since 1934 has broadcast lectures and lessons by Harvard, Radcliffe and Boston...