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Longest wave length

  1. Jan 7, 2005 #1

    wolram

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    A basic question i know, but what is the longest em wave length
    man made or natural?
     
  2. jcsd
  3. Jan 7, 2005 #2
  4. Jan 7, 2005 #3
    I’ve often wondered about this, years ago I asked a similar question “longest and shortest”. The latter possibly limited to the Planck length. The longest, I don’t think I got an answer. If and when the least massive particle is found, I suppose that will generate the lowest frequency. I recall reading lately about the galactic size wavelengths of “dark matter”.
     
  5. Jan 7, 2005 #4

    wolram

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    by GENIERE
    I've often wondered about this, years ago I asked a similar question "longest and shortest". The latter possibly limited to the Planck length. The longest, I don't think I got an answer. If and when the least massive particle is found, I suppose that will generate the lowest frequency. I recall reading lately about the galactic size wavelengths of "dark matter".
    ------------------------------------------------------------------------
    Galactic sized wavelengths of dark matter sounds interesting, do
    you have a link?
    I was thinking about the time it takes to produce such waves and
    the source.
     
  6. Jan 7, 2005 #5

    DaveC426913

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    That seems elementary. To produce a wave that's 100,000 light years peak-to-peak ... would take 100,000 years.
     
  7. Jan 7, 2005 #6
  8. Jan 7, 2005 #7

    wolram

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    Thanks GENIERE .
     
  9. Jan 7, 2005 #8

    Averagesupernova

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    I am as we speak creating the worlds longest wavelength signal. I'll let you know when it completes its first cycle. :rofl:
     
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