I clarify my question: beyond the event horizon of a black hole, according to general relativity, the space-time flows faster than the speed of light. If it is the case, then, no information can be transmitted from here.

But then, if i drop an apple, say, in the black hole.

The black hole would then gain mass, and i could theorically mesure that gain with the event horizon radius variation and the attraction, meaning that the information of its mass and attraction change went from the center to get out of the event horizon.

In other words, that gravity information would have been faster than light?

How is that possible and where did i not understand something? (Just daydreamed about this stuff so maybe my question in itself is idiotic, sorry physicists)

  • Libra00
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    274 days ago

    Because light is affected by gravity but gravity isn’t. Gravity—the curvature of space-time—can’t stop changes in the curvature of spacetime from propagating outward. But also that information isn’t coming from inside the event horizon, it’s coming from spacetime around it.

    • @TauZero@mander.xyz
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      53 days ago

      Gravity—the curvature of space-time—can’t stop changes in the curvature of spacetime from propagating outward.

      This is false. If it were true, you could build a device to communicate from inside a black hole event horizon. By waving around a heavy ball you would create gravitational waves that a sensitive enough LIGO outside the black hole could detect. But this is impossible. You would create gravitational waves, yes, but they would fall towards the center singularity same as you, and will never penetrate and escape the event horizon.

  • @AbouBenAdhem@lemmy.world
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    64 days ago

    You only know the total mass, charge, and angular momentum of the black hole—you don’t know how those properties are distributed inside the event horizon. You see the apple approach the horizon and the horizon expands to encompass the apple-black hole system, but that information isn’t coming from the singularity at the center—it’s coming from the horizon.

    • BombOmOm
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      44 days ago

      Exactly, that information isn’t coming from inside the black hole. In fact it is the lack of information that tells us such things. We know the ratio between the lack of information (the event horizon) and the mass of everything inside.

  • @JohnDClay@sh.itjust.works
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    24 days ago

    I have no idea. But maybe the gravitational location would appear to asymptotically approach the event horizon similar to how light from an object would appear to just approach the horizon and then stay there.

  • Didros
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    -13 days ago

    In no way listen to anything I ever say anywhere. But especially on physics.

    That being said, my understanding is that quantum computing is revolutionary because it allows instant transmission of information across unlimited space.

    Particles that mimic each other can be placed on either end of a ‘would-be-cable’ connection and machines can interpret their on and off states as binary.

    What happens to a set of these paired particles if one goes into a black hole? Now that I wanna know!

    • @TauZero@mander.xyz
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      63 days ago

      quantum computing is revolutionary because it allows instant transmission of information across unlimited space

      False and common misconception! In quantum mechanics there is even a theorem called the no-communication theorem that mathematically proves that no information can ever be transmitted by quantum entanglement. Sorry!

      • Didros
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        23 days ago

        Never be sorry for knowing something! Thank you for the info! :)

  • ℕ𝕖𝕞𝕠
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    14 days ago

    the fastest way to detect the event horizon is by shooting light past it, so no, not faster