It can look dumb, but I always had this question as a kid, what physical principles would prevent this?

  • folaht@lemmy.ml
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    9 hours ago

    If you’re openminded enough to listen to those who disagree with the standard model,
    take an elastic band and turn one end. Instead of the band turning, you’ll have a twist in your band
    and it takes time to unravel the twist. That’s what will happen to the stick and this travels at lightspeed,
    because this is what light does. Light works like ‘the stick’ in your example.
    And if you try turning it faster the ‘elastic band’/stick/‘atom on the other end’ starts breaking.

    If you need FTL communication, then use gravity…somehow.

    • Pinklink@lemm.ee
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      5 hours ago

      Probably quantum entanglement, which we (and certainly I) don’t fully understand yet

        • Longpork3@lemmy.nz
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          8 hours ago

          Space bends due to gravity. Light continues in a straight line through the now non-linear space, thus appearing to bend.

        • Klear@lemmy.world
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          8 hours ago

          Gravity bends spacetime, light always goes in a straight line, bent spacetime means straight lines can be curvy. That all checks out.

          But none of that helps you with FTL communication.