Word: wavelength
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...week Dr. J. P. Foltz, engineer, invited scientists to the Westinghouse Research Laboratories, East Pittsburgh, Pa. to show them a small contraption which could analyze the street car's rattle-bang-clank-screech. The machine consists of a microphone, an amplifier, a filter circuit which allows only one wavelength at a time to pass to the meter for measuring. Since the machine weighs only 60 lb., is independent of outside current, it can easily be transported from one noisy place to another...
...hematine. Or ganic chemists are now experimenting with the substance, using it upon animals to de termine how doctors may employ it to cure human disease. Sir Chandrasekhara Ven kata Raman discovered in 1928 that when monochromatic light shines on a trans parent substance like quartz, chloroform, water, the wavelength of some of the scattered light is changed. Thus what was originally a pure yellow may con tain green, blue. This is now known as the Raman effect, has been used as a proof of the new quantum theory of light...
Light can pick its way through fog particles when the particles (water drops) are not greater in diameter than the wavelength of the light. Thus the longer wavelengths, like infrared, are the most penetrating. Since infra-red is invisible, special detectors are necessary to pick up the rays. Often used is the thermocouple or electric thermometer...
...shadow fell upon Niuafou. He reported that the performance was only what he expected. When, however, his 112 photographs of the phenomenon were developed, Dr. Mitchell pronounced the expedition's success "unequaled in astronomical annals." Spectroscopic analyses of the incandescent gases which surround the sun showed a new wavelength which scientists had never known before. The visible spectrum ranges from 8,000 to 4,000 angstrom units.* Dr. Mitchell's wavelength was 6,770 angstrom units. The camera recorded what the astronomer's eyes had missed-disturbances in the corona on the east and west edges...
This year Michigan appropriated $60,000 to set up a broadcasting system for the State police. State-owned and operated, the central station was to be in East Lansing. The power: five kilowatts. The wavelength: 124 metres. Receiving sets were to be supplied all State-police stations, all sheriffs' office's. As a matter of comity Michigan officials had taken their broadcasting plans to Washington, asked the Radio Commission to issue forthwith a permit to erect the station, a license for its operation. The Commission had rejected Michigan's demand, temporized, set a hearing date...