Ultraviolet/visible spectrophotometry is used to measure the absorption capabilities of certain compounds with reference to wavelengths of light on the ultraviolet and visible light ranges. [Skoog, West, and Holler; Fundamentals of Analytical Chemistry. 7th ed. pg. 57-58; 1996.] [Journal of Photochemistry and Photobiology A: Chemistry; v187; 1-9; 2007.] [Atmospheric Environment; v29; 3239-3243; 1995.]