. Electronic apparatus for biological research . 6,000 7,000 Wavelength A Figure Spectral response of various selenium barrier-layer cells of American manufacture Photo conductive cells Several substances exhibit the property of altering their electrical resistance when radiant energy falls upon them, and this enables them to be used as photodetectors. Interest in the detection of infra-red radiation during World War II resulted in the development of a number of photocells in this class. As light from a tungsten source contains much of its radiant ener
. Electronic apparatus for biological research . 6,000 7,000 Wavelength A Figure Spectral response of various selenium barrier-layer cells of American manufacture Photo conductive cells Several substances exhibit the property of altering their electrical resistance when radiant energy falls upon them, and this enables them to be used as photodetectors. Interest in the detection of infra-red radiation during World War II resulted in the development of a number of photocells in this class. As light from a tungsten source contains much of its radiant energy in the infra-red, these detectors work well in conjunction with a tungsten lamp. The lead sulphide cell is the best known. 372
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
