This question has gone unanswered by our friends in nuclear/atomic threads. My question relates to a solitary Tc^99m decay in particular, and to gamma rays in general. If light is a collapse able wave function, are different wavelength energies the same, ie gamma, x, radio, etc. My suspicion is yes. Does this mean that a gamma photon detected from a far away galaxy is in fact the collapse of an ever expanding wave function?