Comment on They Need To Stop Doing This

• affiliate@lemmy.world ⁨1⁩ ⁨year⁩ ago

  that would really help with playing video games

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• spez@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

  What’s hollow core fibre.

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  • sloppy_diffuser@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

    Its a type of fiber optic cable where the center of the cable is literally hollow. Normal fiber uses a glass core. Light passing through glass also travels about 2/3 the speed of the light since the speed of light is only constant in an empty vacuum. With hollow core, light is no longer passing through glass so its speed is much closer to the actual speed of light.

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    • mindbleach@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

      … wait, how does that work? Total internal reflection happens at the boundary to a lower index of refraction.

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      • sloppy_diffuser@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

        I don’t know the physics well enough, but here is some general information.

        en.m.wikipedia.org/wiki/Photonic-crystal_fiber

        www.rp-photonics.com/hollow_core_fibers.html

        High Group Velocity, Low Latency Signal Transmission

        The group velocity of guided light is usually close to the vacuum velocity of light. This implies substantially lower latency for signal transmission through hollow-core fibers.

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      • Croquette@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

        My dumb person guess is that it needs to be in a perfectly straight line.

        There’s probably more to it.

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    • Cort@lemmy.world ⁨1⁩ ⁨year⁩ ago

      How do you get internal reflectance with a hollow core?

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      • AffineConnection@lemmy.world ⁨1⁩ ⁨year⁩ ago

        You can’t have total internal reflection within a hollow core, but that’s not how they function.

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