Spectroscopyis the study of the interactions of electromagnetic radiation, or light, withmatter in order to gain information about the atoms or bonds present within thesystem. There are many different types of spectroscopic ways of doing things;however, most of the ways of doing things are based on the absorption oremission of photons from the material being studied. The applications ofspectroscopy span a variety of fields of study and can allow scientists to,among huge numbers of other things, decide/figure out the elemental(combination of different substances, objects, people, etc.) of a nearby dwarfstar, the chemical identity of an unknown white powder sample, whether atransfected (tiny chemical assembly instruction inside of living things) hasbeen expressed, or the types of individual bonds within a molecule.Spectroscopy is the study of how light interacts with matter. It allowsscientists in a broad organized row of fields to study the composition of bothvery large and very small systems.
Each spectroscopic way of doing things is unique;however, most of the widely used ways of doing things are based on one of three(important events or patterns of things): the absorption of light by matter,the emission of light by matter, or the scattering of light by matter. A photoncan behave as both a particle and a wave. For most spectroscopic ways of doingthings, the wave nature of the photon is the most critical because thewavelength of light being gave off/given off, soaked up (like a towel), orscattered is where the information about the sample is contained. Absoprtionspectroscopy involves the Absorption of photons by matter and can giveinformation about the types of atoms or bonds in a molecule.
Usually, a givenmaterial will soak up (like a towel) clearly stated/particular wavelengths oflight and will reflect or transmit all the other wavelengths. Emissionspectroscopy involves the emission of photons from a sample on excitation.Scattering deals with light that is in elastically scattered from a sample,meaning that the wavelength of light bouncing off the sample is not the same asthe wavelength of light that was shined on the sample.