Body: "Spectroscopy" is the field of the interaction between matter and electromagnetic radiation.
Some subfields in "Spectroscopy" include polymer chemistry, characterization of materials, characterization of hydrogen bonding, structure and dynamics of amphiphilic molecules, infrared spectroscopy.
Some motivations are help astronomers to determine the composition, temperature, density, and motion of an object.
Steve Bender, Roger Clark, Deborah Domingue Lorin, William Feldman are a few specialists of "Spectroscopy".