> See also: > - [[Determining Molecular Structures]] > - [[CryoEM]] > - [[Spectrophotometry and Colorimetry]] # Spectroscopy **Spectroscopy** is the branch of science concerned with the investigation and measurement of spectra produced *when matter interacts with or emits electromagnetic radiation*. | Type of Spectroscopy | Region of Electromagnetic Spectrum | Information Obtained | | --- | --- | --- | | Nuclear Magnetic Resonance (NMR) Spectroscopy | Radio Waves | The specific arrangement of all carbon and hydrogen atoms in the compound | | [[Infrared Spectroscopy]] | Infrared | The functional groups present in the compound | | UV-VIS Spectroscopy | Visible and Ultraviolet | Any conjugated $\pi$ system present in the compound | | Spectrophotometry | | | ## Spectrophotometry Spectrophotometry is an analytical method of measuring the amount of light absorbed by a substance in a solution to determine identity, concentration, and other properties ## Circular Dichroism