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  1. #1
    Atomic Punk
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    05.31.14 @ 08:17 PM
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    Default Scientist-Types Discover That Some Light Beams Don't Go In Straight Line

    Some Light beams go around the corner:

    http://www.physorg.com/news141924149.html

    The academics have developed the concept of moving particles within light beams that follow curves rather than go along straight lines building on their work in the area of optical manipulation.

    Professor Kishan Dholakia of the School of Physics and Astronomy commented, "Physics holds many surprises; our understanding of how light moves and behaves is challenged by such beams and it is exciting to see them move into the interdisciplinary arena - light has thrown us a curve ball.

    "A standard beam of light spreads as it travels due to the wave effect known as diffraction. Take a laser pointer - even that would be 100km wide if this light beam were to reach the moon.

    "Our research has shown that certain light beams do not diffract or spread - they can travel around corners and propel particles round corners. This is a new discovery in the phenomenon of light moving particles."

    Thirty years ago scientists found that the Airy beam, named after the famous British astronomer Sir George Airy, had a mathematical parallel in optics. Recently, it was discovered that the beam actually 'bends' or curves as the beam moves through space unlike a laser pointer, for example.

    The St Andrews team have now taken things much further by utilising this unusual curving property of Airy beams to send particles literally around curves and corners, sweeping aside or 'clearing' particles within a sample chamber
    Cool...
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  2. #2
    Atomic Punk WinterlessIceness's Avatar
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    That's too egg-head-ish for me, but I'm sure they'll make a 7854-terabyte phone integrated into contact lenses in 10 years with that.

  3. #3
    Hot For Teacher mike-o's Avatar
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    I thought gravity had the ability to do this... like don't black holes bend light

  4. #4
    Atomic Punk ZeoBandit's Avatar
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    12.14.17 @ 05:57 AM
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    Yes. Black holes can bend light.
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  5. #5
    Future's in the past....
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    11.03.17 @ 01:35 PM
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    Quote Originally Posted by ZeoBandit View Post
    Yes. Black holes can bend light.
    I wasn't aware Paris Hilton had that ability.
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  6. #6
    Atomic Punk chefcraig's Avatar
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    03.07.10 @ 06:18 AM
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    Quote Originally Posted by ZeoBandit View Post
    Yes. Black holes can bend light.
    Yet that is not the point of the article. This deals with forms of light that do not expand as they go forward, rather they remain in a tight cluster that allows it to bend of it's own accord, not through the application of another source such as a black hole.

    Think of dropping a rock in a still pond. The ripple effect takes place, as the waves spread out from the source. Same thing with most light beams: they get bigger as they distance themselves from the source. This is why (as the article mentions) a pen-light laser fired at the moon would be nearly a mile wide by the time it gets there.

    With the forms of light being discussed, it's sort of like the projection stays in a huge fucking garden hose. Since the light beam is concentrated this way, it can warp around corners without any noticeable dilution of intensity, just like you can shape a hose in your back yard and the water from the tap will follow it. Yet if you unscrew the hose from the tap, gravity takes over and the water goes straight down, soaking your foot. So what is revolutionary here is that these forms of light beams do not require an outside source (the garden hose or a black hole) to alter their course: they do it unto themselves.
    "The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man."
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