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Magnetic field detectable around axis of laser beam?

  1. Aug 27, 2009 #1
    I've looked for this subject but perhaps I'm asking the question the wrong way. Please advise.
    Is there an extension of magnetic field (flux) beyond the beam axis of a laser? In other words, can one detect (or has anypone attempted to detect) the magnetic field around the a light beam in a vacuum without actually entering or interupting the beam?

  2. jcsd
  3. Aug 30, 2009 #2
    I'm sure of the correct answer. But I once looked up what the radially symmetric solution to a wave propagating in one direction is.

    The only solutions is Bessel beams
    http://arxiv.org/abs/physics/0006046 (page 6)

    The magnetic field oscillates and falls off as [itex]1/\sqrt{\varrho}[/itex]

    Maybe that's the answer.
  4. Aug 30, 2009 #3
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