Spectroscopy - Reflexions

Spectroscopy

This is a technique of analysis that uses optical equipment that allows light to be dispersed as a function of its wavelength. The result is called a spectrum of emission or absorption, according to whether one is analyzing light that has passed through a body, or light that has been reflected by one. These spectra provide important information, since atoms or molecules emit spectra made up of “furrows” that have characteristic wavelengths. Spectrometric analysis thus allows one to detect and measure substances. The dispersing element, which allows the light rays to deviate, is obviously chosen according to the wavelength, and the level of precision required. The oldest and best known of such elements is the prism, already used by Newton in the17th century.