Förster radius

The Förster radius is a measure in chemistry and biophysics that indicates the effective distance over which energy can be transferred between two fluorescent molecules, or chromophores. When one molecule, the "donor," absorbs light and becomes excited, it can transfer some of that energy to a nearby "acceptor" molecule without emitting a photon. The Förster radius is typically within 1 to 10 nanometers, defining how close these molecules need to be for efficient energy transfer. This concept is crucial in fields like imaging, sensing, and understanding biological processes.