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08/01/1935 Spectrophotometer is patented


The Spectrophotometer: A demo and practice experiment


Spectrophotometry introduction | Kinetics | Chemistry | Khan Academy

Device for the measurement of transmittance or reflectance of solutions, transparent or opaque solids, such as polished glass, or gases. It is used in many industries including semiconductors, laser and optical manufacturing, printing and forensic examination, and for the study of chemical substances.