Word: wave
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Dates: during 1920-1929
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...conference was necessary because there are a limited number of channels in the ether through which radio communication can pass. Several messages at the same time upon a particular wave length, or too near it, destroy each other over a wide area of the earth (interference). Traffic regulations were needed...
After 20 years, Mary Byrne, teacher at the model school of the New York Training School for Teachers, began to fear the incessancy of this schoolteacher's routine. She would quite often feel a wave of hatred for her pupils, followed by a sentimental shame which made her look at them with a foolish smile. This amused the children. They could scarcely help writing smutty words on the blackboard or making noises to scare Miss Byrne. The other teachers began to notice that she seemed a little gruff when they met her on the stairs. Once she rated...
...Briefly stated," Professor Kennelly said, "the purpose of the conference was to define the sovereign radio rights of the nations represented, and to agree upon a schedule of wave lengths such that no nation would interfere with the radio operations of any other power...
...wave lengths were allotted internationally by services all over the world, from the maximum length of 30 kilometers down to the minimum length of five meters. The allotment was not made to individual stations, but to services, such as point-to-point fixed station service, mobile service, including ships, aircraft, and vehicles of all kinds, broadcasting, and miscellaneous other services...
...electron whirling around its nuclear "sun." Heavy metals, like lead, radium and uranium, have many electrons. In some elements some of the electrons pop away from their atoms. Such elements are radioactive. X-rays can make them pop away violently. When x-rays act so, Professor Compton learned, their wave lengths, thousand millionths of an inch long, change. Roughly, the picture is that of a rowdy butting people on a dance floor. Each time he bumps a dancer he loses a little of his energy; later he has strength enough only to jostle them; finally he goes aimlessly away...