text: An effect of this name named for Fermi occurs due to mixing between vibrational modes with identical symmetries in vibrational spectroscopy.
full_question: An effect of this name named for Fermi occurs due to mixing between vibrational modes with identical symmetries in vibrational spectroscopy. This phenomenon is the principle behind a form of Raman spectroscopy which enhances signal by tuning the lasers frequency near that of an electronic transition. This phenomenon can enhance Raman signal by up to an E4 enhancement for molecules adsorbed onto rough metal surfaces or nanoparticles. This phenomenon can be used to analyze the binding of molecules to functionalized gold or silver surfaces, and is responsible for the effectiveness of SERS. When a microwave matches the energy of a transition created due to Zeeman splitting, this phenomenon occurs, resulting in a peak in ESR. For 10 points name this phenomenon in which an oscillating system increases its amplitude when driven at a certain frequency.
first_sentence: An effect of this name named for Fermi occurs due to mixing between vibrational modes with identical symmetries in vibrational spectroscopy.