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?

  • Onomatopoeia@lemmy.cafeEnglish
    3·
    3 days ago

    Ooh, interesting point.

    I suspect all EM would be shifted according to the angle relative to the target - so at exactly 90° It would be “half shifted” - or zero. (Assumption based on blue/red shift of light).

    I’m assuming the traveler is at a percentage of C, not at C (I think being at C is a completely different scenario, like would any EM escape the traveler?).

    But I’m only an armchair quantum physicist (I’ve read a few books over the years). Look forward to what someone who understands Quantum Weirdness has to say.