In physics, spectrophotometry's the quantifiable study of electromagnetic spectra. It's more specific than the general term electromagnetic spectroscopy in that spectrophotometry deals with visible light, near-ultraviolet, and near-infrared. Also, the term doesn't cover time-resolved spectroscopic techniques. Spectrophotometry involves the use of a spectrophotometer. A spectrophotometer's a photometer (a device for measuring light intensity) that can measure intensity as a function of the color… (More on Spectrophotometry)