25th Annual Student Research Conference
Raman Spectroscopy
Anshumaan Srinivasan
Dr. Mohammad Samiullah, Faculty Mentor
In 1928, C.V. Raman observed that the frequency of light passing through materials can change. In a scattering process, a molecule absorbs a photon and uses the energy from the photon to excite an electron to a higher energy level. However, about 1 in 10^9 photons undergo inelastic collisions. In this process, the emitted photon emerges with energy equal to the energy of the transition that resulted from absorption. In in inelastic collision, the photon emitted has an increased or decreased energy and an associated frequency shift. This phenomenon, called the Raman Effect, gives information about the energy levels of a molecule. For visible light, the change in photon energy corresponds to vibrational and rotational modes of the molecules. In this presentation, we will explain an experimental set-up for Raman spectroscopy illustrating the energy levels of spectra of simple molecules.
Keywords: Raman Spectroscopy, Inelastic collisions
Topic(s):Physics
Chemistry
Presentation Type: Oral Paper
Session: 406-3
Location: MG 1096
Time: 3:00