Comment on Speediest little fella.

• Entropius@lemmy.world ⁨11⁩ ⁨months⁩ ago

  What’s happening in a medium is the rapid absorption and readmission of photons. […]

  You can think of it as the photons having to jump between platforms before the can continue running at c.

  That’s an intuitive model, but unfortunately it doesn’t have the advantage of actually being correct. Photons are not being absorbed and reemitted. See here for why: lemmy.world/comment/5444224

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  • Neato@kbin.social ⁨11⁩ ⁨months⁩ ago

    That is wrong. Stochastic yes. Photons emission is probabilistic. Destructive interference causes emission to overwhelming follow classical wave theory. Here's a better explanation with a neat graphic.

    https://physics.stackexchange.com/questions/466/what-is-the-mechanism-behind-the-slowdown-of-light-photons-in-a-transparent-medi

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    • Entropius@lemmy.world ⁨11⁩ ⁨months⁩ ago

      It sounds like you’re conflating different concepts. A stochastic process like absorption/reemission would blur the light, so that’s not it. And the linked explanation is basically correct (in classical physics at least), but it doesn’t corroborate what you originally claimed as that’s not necessarily requiring absorbing anything. Photons can jiggle the charged particles in glass and get them to make new phase shifted light despite not being absorbed.

      youtu.be/YW8KuMtVpug

      youtu.be/CiHN0ZWE5bk

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• trash80@lemmy.dbzer0.com ⁨11⁩ ⁨months⁩ ago

  Now I’m not sure how reflective telescopes work.

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  • TonyTonyChopper@mander.xyz ⁨11⁩ ⁨months⁩ ago

    reject reflectors return to long tubes Image

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  • Neato@kbin.social ⁨11⁩ ⁨months⁩ ago

    Interference in matters structure causes classical wave like behavior.

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    • trash80@lemmy.dbzer0.com ⁨11⁩ ⁨months⁩ ago

      I find so much of physics to be very intuitive and then you have light.

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