Physikalisch-chemisches Praktikum I UV/VIS Spectroscopy { 2017 Figure 2: Absorption band and full width at half maximum. h [1][2][3][4][5][6] In simpler terms, spectroscopy is the precise study of color as generalized from visible light to all bands of the electromagnetic spectrum; indeed, historically, spectroscopy originated as the study of the wavelength dependence of the absorption by gas phase matter of visible light dispersed by a prism. The combination of atoms into molecules leads to the creation of unique types of energetic states and therefore unique spectra of the transitions between these states. 5.33 Lecture Notes: Introduction to Spectroscopy Page 3 2) Emission: Excitation induces emission of light from the sample (usually of different frequency). If you continue browsing the site, you agree to the use of cookies on this website. Common types