Quote:
Originally Posted by RussT
Even though that single photon has 0 velocity, in its own frame, for every 186,000 miles it travels, 1 second of Time passes.
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But that is from an observer's perspective. Not the photon's.
For the photon (or ship) the trip was instantaneous.
It wouldn't know that 1 second has passed (in a 186,000 mile trip) until it arrived and found out related to the welcoming party.
Imagine instead of a ship...a magical doorway. You walk through and are instantly somewhere else across the solar system where your twin is waiting.
For you.... but not for your twin. They are older than you are when you get there.