Laser Beams Deflected Off of Nothing but Air for First Time Ever in Breakthrough Patent Pending Process - The Debrief::An international team of scientists report that they have successfully used acoustics to deflect laser beams in an engineering first.

  • Subverb@lemmy.world
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    1 year ago

    140 decibels. I’m sure some applications exist but it won’t be a 3D TV soon.

    • Slowy@lemmy.world
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      1 year ago

      In an ultrasonic frequency we can’t hear. But your pets and any nearby bats or rodents etc may be upset by it…

      • Scubus@sh.itjust.works
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        1 year ago

        Fun fact, if sound travelled through space, the sun would be as loud as a jackhammer everywhere on earth. Second fun fact, due to the fact that we evolved on earth you wouldve evolved to not be able to hear that frequency.

    • sir_reginald@lemmy.world
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      1 year ago

      considering the lab experiment with just one laser required a sound level of about 140 decibels that consume 20 gigawatts, I don’t think holodecks are going to be a practical device.

      • Seasm0ke@lemmy.world
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        1 year ago

        Great points, but you know how things go. Proof of concept is a bloated laboratory implementation, then the tech gets smaller and more efficient over time. Next thing you know the sound is outside of human hearing range and the laser projector is fitted to a drone.

        • echo64@lemmy.world
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          1 year ago

          More realisticly how things go, experimental research only works in lab conditions, clickbait article suggests it’s coming next year, people make giant assumptions, people lose faith in science because the promised thing doesn’t arrive

          • Seasm0ke@lemmy.world
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            1 year ago

            Lol probably, we are definitely more on track for cyberpunk or idiocracy than star trek post scarcity socialist utopia

      • ThoGot@lemm.ee
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        1 year ago

        It may be interesting to see how humidity and temperature influence the laser (or even other gases as mentioned in the article)

  • Reygle@lemmy.world
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    1 year ago

    Horseshit. Don’t piss on my head and tell me it’s raining.

    Edit: this is more horseshit like the “room temperature superconductor” that was instantly debunked as a horseshit scheme recently.

    Sound pressure waves cannot distort spacetime

  • NotMyOldRedditName@lemmy.world
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    1 year ago

    Space battles would be so much cooler if every now and then the phaser gets split around the ship instead of hitting the shields.

    Would also work even when shields are down.

      • abhibeckert@lemmy.world
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        1 year ago

        Doesn’t need to be air “in space”, there just needs to be air somewhere between the laser weapon and whatever it is you don’t want the weapon to destroy…

        … although it’d probably be easier to use a mirror. Maybe one pointing directly at the person holding a laser weapon. ;-)

        • brianorca@lemmy.world
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          1 year ago

          Corner reflector. Send it back where it came from, without knowing where they are ahead of time.

        • LinuxSBC@lemm.ee
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          1 year ago

          A mirror? Light won’t reflect off of nothing. The closest you’ll get is gravitational lensing, but that requires about a galaxy’s worth of mass to make any noticeable difference.

      • off_apparition@lemmy.world
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        1 year ago

        No, it’s just a crystal and a piezo. You can focus into the AOM to get lower rise times but it works without any lenses.

        • karakoram@lemmy.world
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          1 year ago

          I think I should have said “optic” in place of “lens”. The crystal is the portion that is being oscillated to divert the beam. It could be that this is exactly the same principle being used by the referenced experiment but with much higher powered acoustic equipment.

  • BradleyUffner@lemmy.world
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    1 year ago

    Green laser beams have been deflecting off nothing but air since we invented green lasers. That’s why they are visible without adding smoke.