tnx. I also found some interesting data and info about energy velocity and its relations to photon lifetime , that is equivalent to group velocity but given as mean value of poynting vector(witch is almost same thing as the intensity ) and an energy density. I am interested: is it possible to...
Hello folks of physics. Can anyone tell me about some exotic photon lifetime definitions for photons in laser cavity? I mean, I looked in all sorts of books related to that topic, and the entire bunch of authors use the same definition: cavity exiting energy through dissipated power; or...