How Much Does a Lie Detector Test Cost. How Much Does a Lie Detector Test Cost. The application potential of polygraphs makes this tool one of the most sought after private investigator services. Many people in the UK seeking the truth in a matter that is of interest to them have turned to private investigators to have polygraphs administered.
Confidence votes 228. Infrared spectroscopy, or IR spectroscopy, is a method of spectroscopy used by organic chemists to help determine the structure of an unknown molecule. An IR spectrum will have peaks based on how much light was visible when shone through different parts of the molecule.
Category: general optics. How to cite the article; suggest additional literature. Infrared light is light with a vacuum wavelength longer than â 700â800 nm, the upper limit of the visible wavelength range. That limit is not well-defined, as the responsivity of the eye is reduced very gradually in that spectral region.