Resonance fluorescence

Resonance fluorescence is fluorescence from an atom or molecule in which the light emitted is at the same frequency as the light absorbed. ^[1] In resonance fluorescence, a photon is absorbed, causing an electron to jump to a higher level from which, after a delay, it falls back to its original level, emitting a photon having the same energy as the one absorbed. The emission direction is random.

Notes

1. ^ Resonance Fluorescence (pdf). IUPAC Compendium of Chemical Terminology. IUPAC (1997). Retrieved on 2007-06-01.