Background: I recently read an excellent book by Brian Greene "The Elegant Universe." On page 51 the author states that all of the photon's movement through time is diverted to movement through space when travelling at light speed in a vacuum. This has the effect of collapsing the time dimension so that the photon never ages. Question: If this is true at light speed in vacuo, what happens if you slow a photon down to speeds of only a few feet per second as has been recently achieved experimentally? Presumably the photon has a non-zero time dimension and may reveal properties not present at light speed. Could the light photon have a half life when after a certain period of time it transforms into something else but at light speed this would be hidden due to zero value of the time dimension? I did email these thoughts some months ago to Professor Greene but unfortunatley did not receive a reply. I would be grateful for your collective wisdom.
Re: Are light photons stable particles at slow velocities?
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