difference between fluorescence, phosphorescence and luminescence Share with your friends Share 2 Ved Prakash Lakhera answered this Fluorescence is the process in which an atom or molecule releases the energy of light, it absorbed. This energy is released when electrons of atom come back to ground state from exited state.Phosphorescence: In this process absorbed energy is not released immediately. Energy is released when electrons are comming back to ground state from trilet state. In this processthe energy released is less than energy released by fluorescence.Luminescence: The light energyluminous flux emitted passing through unit surface area when area is normal the emissions is called luminescence.. 0 View Full Answer