infrared spectroscopy definition
Infrared Spectroscopy. (also IR spectroscopy), the branch of spectroscopy that includes the production, study, and use of emission, absorption, and reflection spectra in the infrared region of the spectrum.nfrared spectroscopy is used in the study of the structure of semiconductors, polymers, biological entities, and living cells. High-speed spectrometers make it possible to obtain absorption spectra in fractions of a second and are used in the study of rapidly transpiring chemical reactions.