Spectrograph

A spectrograph is an instrument that is used to record emission or absorption spectra. It allows you to decompose emission or absorbed light into components with different wavelengths and measure the intensity of each component.

The name "spectrograph" consists of two parts: "spectrum" and the Greek word "grapho", which means "to record". That is, a spectrograph is a device that records a spectrum.

The operation of a spectrograph is based on the phenomenon of light dispersion, in which a beam of light is decomposed into components with different wavelengths. This is achieved using a diffraction grating or prism, which splits the incident beam into individual monochromatic beams. The intensity of each beam is then recorded by a photodetector.

Spectrographs are widely used in astronomy, physics, chemistry and other fields to analyze the composition and properties of substances based on their emission or absorption spectra.