Word: light
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Dates: during 1920-1929
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Fifty-three years ago there was a physics instructor at U. S. Naval Academy who developed a great curiosity. He wanted desperately to know just how fast light travels. He was then a young man of 23. Now he is 76 and has become a veritable epicure in curiosity. He demands the very tittles of exactness...
Objects of Observation. There were two chief purposes which motivated the scientists who carried huge pieces of apparatus including two telescopes over 60 ft. long to the tiny spots where observations were possible: 1) To study the "Einstein effect" - to determine the amount which the light rays of stars are deflected in passing close to the sun; 2) To study the nature of the sun by taking pictures of its corona and outer layers...
...salability, the Eastman tinting is described as giving scenes ''colors conforming to their emotional content." Two makes of talkies (R.C.A. and Western Electric) have their sound records on the edges of the films. Hitherto, if a film was tinted it interfered with light passing through the sound track, distorted the sound. Experiments were made with tinting only the visual portion of the film. The method was successful, but expensive. Then efforts were bent to securing tints that would not affect the light passing through the sound record. This has been achieved so that there is hardly any perceptible...
...years of experiment Professor Albert Abraham Michelson, now the world famed physicist of Chicago University, has little by little whittled away the inaccuracies surrounding the calculated speed of light. In 1926, he set up two reflecting mirrors of his own design on Mount Wilson and San Antonio Peak near Pasadena, Calif. The U. S. Geodetic Survey measured the distance between his two instruments, about 22 miles, and assured him that its figure was accurate within one-third of an inch. Playing light from mirror, he timed the 44-mile round trip, calculated the speed of light...
Last week he announced another experiment-to try to time the speed of light still more accurately. He will build a pipeline one mile long and three feet in diameter. From it he will exhaust the air, leaving a vacuum. In a vacuum it will not be necessary to make corrections for temperature, pressure and moisture, as it was in the open air. Once more he will set up his mirrors, allow a beam of light to make five round trips through the pipe and time it for the ten-mile trip...