Seems, there is an opinion if the photon is absorbed it come out from existence. This is an erroneous opinion.geistkiesel said:Mike- Once a phoon has been used and its energy consumed does not this put your photon in the classification of a log of wood tossed into the fireplace?
I also agree that unless perturbed, or absorbed the photon will live forever (whata concept, huh?) , but don't we want to have some use from the perpetual nature of the 'machine'/
Of course the universe has an effective supply of photons, so I would agree with you there that harnessing photons as an energy source would provide energy as long as the universe remained in a state of existence.