Split and merge into it. Answer by Artifaxiom. Confidence votes 174. Ultraviolet (UV) spectroscopy is a method of determining which wavelengths (colours) of visible light a sample absorbs or emits.There are three main types of UV spectroscopy: transmittance, absorbance, and emission.Transmittance and absorbance spectroscopy are opposites of one another.plit and merge into it. Answer by Artifaxiom. Confidence votes 174. Ultraviolet (UV) spectroscopy is a method of determining which wavelengths (colours) of visible light a sample absorbs or emits.