Infrared spectroscopy is a method that analyzes the vibrations of atoms in a molecule.
An infrared spectrum is generally acquired by sending infrared light through a sample and
calculating how much of the incident radiation is absorbed at each energy level. The frequency
of vibration of a section of a sample molecule resembles the energy at absorption. The
fundamental concepts and terminology of infrared spectroscopy are presented in this chapter.
The vibrations of molecules will be examined in this section since they are critical to the
understanding of infrared spectra. Various applications of IR spectroscopy are also discussed
in brief.
Keywords: Bending vibrations, FTIR, Fermi resonance, IR, Monochromator, MidIR, Modes of vibration, Spectrum, Spectrometer, Stretching vibrations, Vibrational frequency.
