Fermi resonance


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Fermi resonance

[′fer·mē ‚rez·ən·əns]
(physical chemistry)
In a polyatomic molecule, the relationship of two vibrational levels that have in zero approximation nearly the same energy; they repel each other, and the eigenfunctions of the two states mix.
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Shows that the amount of Fermi resonance between a fundamental vibration and a combination or overtone is altered with change of physical phase