Riding on a Photon: Is Time Really Eternal?

[hamilton00989]

I do aware that it is impossible to be in a frame with C velocity.
But suppose I could ride a photon (suppose). Outside observers will say that my clock ( on the photon frame) will stop.
From my point of view (riding on the photon), all the universe will be eternity ( time will not run).

Is that correct?

hamilton

 

[HallsofIvy]

Once again, if you postulate a situation that is impossible under a particular physics theory, it makes no sense to ask "what would that theory say about this situation?"

 

[JesseM]

See this thread...I think the closest you can get to meaningfully answering this sort of question is to talk about how certain things look in the limit as v approaches c:

if I'm moving at some very large fraction of c relative to the galaxy, not only do I measure the galaxy to be highly compressed in the direction I'm going, but I also see clocks on either end of the galaxy as wildly out-of-sync...if the galaxy is 100,000 light years long in its own frame, and I'm moving at speed v relative to it, then two clocks at either end of the galaxy which are synchronized in the galaxy's frame will be out of sync by (100,000 ly)*(v)/c^2 in my frame. So, in the limit as v approaches c, clocks on either end of the galaxy are out-of-sync by 100,000 years, so at the same moment that it's 2008 A.D. on the leading edge, it's 102,008 A.D. on the trailing edge. And yet in the limit as v approaches c, the distance between clocks along the direction of motion is compressed to zero. So in the limit, perhaps you could say that the photon's entire history is traversed instantly, since it's going zero distance and all the different clock-readings it passes are squashed together on this zero-length path. But again, there are a lot of aspects of the limit that aren't well-defined, and it's definitely not correct in SR to talk about a photon having its own rest frame.

 

[Dale]

I do aware that it is impossible to be in a frame with C velocity.
But suppose I could ride a photon (suppose). ...

As long as you know that you are doing science fiction (and not science) then go ahead and suppose whatever you want.