:29451528 : what's not a useful tone is the carping and sniping about
am I just some energy travelling at light speed? The answer is yes. A
radiating body loses mass. Look to Compton scattering and to pair production. You can convert a photon into the motion of electrons, or into electrons (and positrons). Look to annihilation too, whereafter the bodies no longer exists, and what does, is
energy travelling at light speed.