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| Walker, Jearl | 1 |
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Walker, Jearl – Scientific American, 1984
Provides background information on and experiments for determining the spectra of streetlights. Procedures for taking photographs of the spectra produced are included as well as discussions of sodium and mercury spectra. (JN)
Descriptors: College Science, High Schools, Higher Education, Light
Gulkis, Samuel; And Others – Scientific American, 1990
Outlines the Cosmic Background Explorer (COBE) mission to measure celestial radiation. Describes the instruments used and experiments involving differential microwave radiometers, and a far infrared absolute spectrophotometer. (YP)
Descriptors: Aerospace Technology, Radiation, Satellites (Aerospace), Science Equipment
