Förster Resonance Energy Transfer
From Lumipedia
FRET http://photobiology.info/PDF/History%20of%20FRET.pdf https://link.springer.com/article/10.1140%2Fepjh%2Fe2013-40007-9
by Dr. B. Wieb VanDerMeer, Department of Physics and Astronomy, Western Kentucky University, Bowling Green, KY 42101-1077, USA.