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this post was submitted on 27 Apr 2026
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Anything moving at the speed of light in one reference frame is moving at the speed of light in every reference frame—including its own.
Which is to say, it’s not a real reference frame at all—the experience of moving at the speed of light would be instant teleportation with no subjective elapsed time. So trying to talk to someone moving at light speed would be like talking to a still image.
I thought time slows down when you approach the speed of light though
Only in comparison to (relative to) others. A photon from the sun experiences no time at all between leaving the sun and landing in your eye but we perceive it as eight minutes.
Oh I see. That makes sense. The fact that it's experiencing less time is why, relative to us, it's time seems to be running slower