He measured the temperature of each color, and found the highest. Introduction to infrared and ir spectroscopy how an ftir bench works why we use a synchrotron some examples. Near infrared spectroscopy nirs is an optical spectroscopy method that employs infrared light to characterize noninvasively acquired fluctuations in cerebral metabolism during neural activity. On the immediate high energy side of the visible spectrum lies the ultraviolet, and on the low energy side is the infrared. Introduction the light our eyes see is but a small part of a broad spectrum of electromagnetic radiation. Spectroscopy is the study of the interaction of electromagnetic radiation with matter. Nirs data consists of a series of timedependent signals measured between individual light source and detector positions on a probe. This technique covers the region of the electromagnetic spectrum between the visible wavelength of 800 nanometres and the shortwavelength microwave 0. Ir spectroscopy which is short for infrared spectroscopy deals with the infrared region of the electromagnetic spectrum, i. The portion of the infrared region most useful for analysis. Infrared spectroscopy is one of the most powerful analytical techniques which provides the possibility of chemical identification.