When a photon is absorbed by a molecule, like chlorophyll, electrons are pushed from an inner to outer orbital. The molecule shifts from a "ground state" to "excited state".
a. If the electron of excited chlorophyll drops back to a lower orbital, what has to happen to the energy that was absorbed?
b. If light is absorbed by isolated molecule of chlorophylls in solution (liquid), the solution becomes very fluorescent. Why?
c. If light is absorbed by chloroplasts in solution (liquid), the solution hardly fluoresces at all. Why?