Spectroscopy is a branch of science that covers the measurement and investigation of dissemination of light that is emitted by an object into colors that constitute the light. A detector that reacts to Infrared rays is called Infrared or IR detector. Photonic and thermal detectors constitute the two main types of detectors. Infrared or IR spectroscopy is an analytical technique that is considered most important for the scientist. IR spectroscopy enables study of any kind of specimen in any form. With judicious option of sampling, various states of an object such as like gases, films, powders, solutions, pastes, surfaces and fibers are being investigated and studied. The type of sample that is being used for IR spectroscopy determines the sampling procedure of IR spectroscopy. The basic theory of IR spectroscopy encompasses the process wherein infrared rays are made to pass or through a sample. The sample, however, takes in some of the radiation and transmits or passes through the rema...