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    Licht selbst wirft einen Schatten in bizarrem Laserexperiment


    Licht selbst wirft einen Schatten in bizarrem Laserexperiment

    https://newatlas.com/physics/light-itself-casts-shadow-bizarre-experiment/

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    21 Comments

    2. Cyanopicacooki on

      >That should rule out light, since photons are massless…creating quasiparticles called polaritons.The team admits that technically it’s these polaritons, which do have mass, that are casting the shadow. But on the other hand, polaritons are still half-photons,

      So, photons are massless, but their half-particles. polaritons, do have mass…

      It’s not yet half past 9 on a Saturday morning and already I’ve realised how little my brain is in comparison to the wealth of the universe. I wonder how many other facts I’ll learn today that I know I’ll never understand.

    4. patricksaurus on

      I expected this to be a flavor of interference, but the actual effect is much cooler. Now I can daydream about possible applications.

    5. robertomeyers on

      Maybe stupid question. Can anyone confirm this was done in a vacuum? I assume they wanted to rule out excited air molecules as the mass.

    6. frosted1030 on

      No citations yet.. given the newness I expect the reproduction of this effect first and plenty of review before anything can be confirmed.

    7. hpmd50s on

      Maybe a thermal lensing effect where the laser heats up the ruby, changing its local refractive index and creating a little lens that deflects the other laser?

    8. ABob71 on

      I wonder how this can be applied to astronomy- can light shadows from things like quasars reveal anything?

    10. ZadfrackGlutz on

      Basically light can move mass….in the form of those quasi photons, from the ruby.

    12. monkeysareright on

      Pretty cool, it’s basically an optical transistor without directly using electrons

    13. incognino123 on

      Misleading headline, green light is manipulating the ruby to absorb more blue light, the ruby is casting the shadow as the term is used

    14. I_love-tacos on

      Question, wouldn’t you be able to build a transistor out of this? It would be infinitely faster and I assume no heat

    15. florinandrei on

      Bullshit title.

      One light beam passes through a material (ruby). It modifies the material. The modified material casts a shadow when illuminated with a second light beam. Boring.

    16. creepythingseeker on

      When light isnt being observed in a lab setting, it can often not be seeing smoking as well.

    17. hibernial on

      OMG does this mean I can actually become a shadow scientist and study shadows? This is soo metal

    18. QuantumCrutches on

      I wonder if you could use this in lithography to make extremely detailed designs

    20. Polar_Vortx on

      tbf “eh kinda sorta not really but more than you’d think” seems to be the usual when it comes to light

    21. moschles on

      High powered lasers that emit UV light can ionize the air. You can construct such a laser in your own home if you know what you’re doing.

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