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Light better than WiFi for network connections?

Discussion in 'Electronic Basics' started by Al in Dallas, Jul 28, 2007.

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  1. Al in Dallas

    Al in Dallas Guest

    I'm not sure this is the right group, but I recently read in
    Scientific American that visible or infrared light would be a better
    method to use to "talk" from a wired point on a wall to a room full of
    computers than current WiFi or any other radio-wave solution. The
    article kept stating that visible or infrared light was better because
    they're made up of photons which don't interfere the way that radio
    waves do. Since radio waves are also photons, this seemed like an
    unreasonable explanation. Does anyone have any idea what the author
    was trying to say?
     
  2. Lord Garth

    Lord Garth Guest

    No, why don't you copy the article? Ir links went over like a lead balloon
    in the mid 1990's. Perhaps you are thinking about fiber to the desktop?
     
  3. Sjouke Burry

    Sjouke Burry Guest

    He tried to explain that you do not get interference
    between your neighbours lights ond yours, unless your
    windows closely face each other.
    In all other cases, light from your neighbours room
    will hardly light yours.
     
  4. PhattyMo

    PhattyMo Guest

    Ever hear of IrDA?? No? Hum,wonder why!
     
  5. Al in Dallas

    Al in Dallas Guest

    Actually, when I used to test cell phones for a living, we kept
    talking about adding an IR port that met with Microsoft's specs. In
    theory, you were supposed to be able to point the phone at the right
    part of your computer and not have to connect it with a cable. This
    was a short while before we started talking about using Bluetooth
    instead, IIRC.

    Of course, my question was why some idiot editors at Scientific
    American implied that radio waves were different from photons and why
    the same idiots implied that these differences were responsible for
    the different types of interference problems.
     
  6. Phil Allison

    Phil Allison Guest

    "Al in Dallas"

    ** Radio waves do not behave like photons in anything like the same way that
    light does.

    The frequencies & hence wavelengths are enormously different:

    Green light = 550 THz = 550,000 GHz !!!!!!!!!!!!

    So the explanation is perfectly sensible.

    Unlike you.




    ........ Phil
     
  7. Clint Sharp

    Clint Sharp Guest

    Not without the full article but it's been done and it fell flat on it's
    arse in the 80s, 90s and probably will do so again.
     
  8. Al in Dallas

    Al in Dallas Guest

    If you subscribe to Scientific American Digital, you can read the
    article at http://tinyurl.com/2xmdnu . It's in the July 2007 issue if
    you want to find it on paper. It's named "Broadband Room Service by
    Light."
     
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