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?


Ah that makes sense
No problem mate. Thanks for all your info and the detailed responses
The last thing I’ll say is, you still need to over come the Doppler effect. But if you can send large enough packets quick enough, you can mitigate some of the issues. The biggest thing is sending something across long distances quickly. That’s the biggest issue. For that, unfortunately, you need faster than light. I hope the information provides a more exciting journey through your story.
In my opinion, the only way to have faster than light communications is a massive breakthrough on the quantum scale. Entanglement is so new and unknown, that I have no idea if that’ll be the answer. It doesn’t seem so to me, though. But quantum mechanics breaks so many laws of classical mechanics, it’s crazy. You’d almost need some wormhole to communicate using classical techniques. I.e radio, photonics, etc. Which I think is where I rest. Photonics for high data transfer pointed at a wormhole. Then someone receives it in the other side. You still have Doppler effect, but much more mitigated. Hope you enjoyed my diatribe. Much love and peace to you, friend.
A wormhole is a cool idea.
Much love and peace to you as well