Word: infra
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...Typical research accomplished with the aid of Rockefeller Funds: Prof. A. A. Michelson's (University of Chicago) experiment with light rays in a pipe-rectangle to check the Einstein relativity theory (TIME, Aug. 11, 1924); Professor Niels Bohr's (University of Copenhagen) atomic investigations in the infra-red region of the spectrum (TIME, Feb. 4, 1924), for which he last week received the Barnard Gold Medal from Columbia University...
Invisible Light. Certain dyes and pigments possess the property of becoming more visible when exposed to the invisible infra-red rays of the spectrum. This fact was utilized for experiments in flash-signal communication that was invisible to any one but the receiver of a message. The receiver was equipped with a tinted shade for his field glasses similar to the shade used in the signal lamp. Application of this phenomenon to airplane camouflage, theatrical scenery and detection of forgeries was elaborated.?Dr. Robert W. Wood, Johns Hopkins University...
...last week, the French Academy of Sciences−and the scientific world in general−was advised by one of its members, M. Daniel Berthelot, that two friends of his, Messieurs J. Risler and P. Mondain, had a preventative and a cure for radiodermitis. Noting that the long-waved infra-red heat rays are antagonistic to shorter-waved constituents of the Xray, such as the potent ultra-violet*Risler and Mondain had contrived a "ray filter" of plastic material, penetrable only by the infra-red and yellow rays. The long-waved rays thus filtered out were then applied to living...
...inch long. On the "ultra" side of this spectrum, occur the ultraviolet rays with waves 1 millionth of an inch; then a range of little-known shorter vibrations; then the famed X-rays; then, shortest of all known rays, the gamma rays given off by radium. On the infra or long wave side of visible light come infrared, then longer heat waves (16 mil- lionths to 12 thousandths of an inch), then Hertzian or radio waves, measuring from a few metres to several miles in length. The longest waves in the spectrum are the slow pulsations of the alternating current...
...University of Copenhagen (TIME, Nov. 19), for the enlargement of his research laboratory in theoretical physics. American physicists as well as others from foreign countries will conduct investigations in the Danish laboratory, which is supported in part by the Danish government. Dr. Bohr will specialize on investigation of the infra-red region of the spectrum and on X-ray spectra...