I’m asking this because there is a scifi book I’m reading, and in the book there’s a scene where someone is communicating with a person in a spacecraft moving at lightspeed. I know their ability to communicate would probably not be possible, but let’s just put that aside for a second. Hypothetically, if you could communicate with someone moving lightspeed, would the time dilation make it so that they would appear to be moving and speaking very slowly relative to you?
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