Subspace is the answer of course!

  • seaQueue@lemmy.world
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    1 year ago

    Uh, no shit? That’s how light works once you’re able to travel at relativistic speeds - communication over interstellar distances using light is going to take ages.

    Even within our own solar system interplanetary travel will have significant communication time delays.

    Edit: also, we already know that matter and light can’t exceed c, but I wouldn’t be surprised if we discover that other forces (gravitation, or another that we haven’t understood yet) can transmit information at speeds >c. I wouldn’t be surprised if we turned to quantum entanglement for instantaneous communication over extreme distances either.

    • xkforce@lemmy.world
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      1 year ago

      Gravity travels at c. The Alcubierre drive tried to use bubbles in spacetime to “bend the rules” in order to result in apparent >c velocities but recent simulations indicate the bubble becomes unstable when attempting to exceed c.

    • KISSmyOS@lemmy.world
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      1 year ago

      Quantum entanglement is like ripping a photo in half, putting both halves in seperate envelopes and carrying them to opposite ends of the world.
      As soon as you open your envelope, you instantly know which half of the photo is on the other side of the planet - Faster Than Light Information Transfer!

      • xkforce@lemmy.world
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        1 year ago

        For a variety of reasons, no information is actually transferred. Quantum entanglement can not be used to get around the limits imposed by relativity.

      • INeedMana@lemmy.world
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        1 year ago

        So it’s not like: when I affect the hue (some attribute) of my half, the other half will change too? That has always been my understanding of it

        • SpacetimeMachine@lemmy.world
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          1 year ago

          No, measuring one particle collapses the entanglement and they no longer affect each other. It is a one time thing. You can’t modify them after they have been observed.

    • SpacetimeMachine@lemmy.world
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      1 year ago

      C is more than just the speed of light. It is the speed of Causality. No information can travel faster than C in a vacuum. Gravitational waves already reach us faster than the light from events that cause them (i.e. neutron star collisions) Because small particles slow down the light over long distances, as they absorb and then re-emit the photons.