Recent content by deep4

i did'nt get it ,how electron is already in excited state?can u provide any mathematical pathway apart from A,B coeff. for energy

let me explain in detail what i really want to know,correct me if i m wrong ,how two photons are of exactly same energy because incident photon at metastable state is carrying energy equal to difference of energies between lower level and higher energy level when it undergo inelastic collision...

thanx for the reply

kindly help me understanding energy conservation in laser