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H6 - Federal Item Name Directory
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11042
SPECTROGRAPH
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FIIG: T271-D
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Entry Date: Apr-01-1974
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Concept:
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Status: A
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Applicability: DA
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Type: 0
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Definition: An optical instrument designed to break up the light from a source into its constituent wave lengths and to provide a means of qualitative or quantitative study of the spectrum line formed. The instrument essentially consists of four parts; the slit, the lenses, the dispersion system and photographic or photoelectric system. The instrument may incorporate a prism or grating system for the dispersion of light.
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Corresponding NIINs: 17
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