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Light waves with 0 amplitude due to extreme red shift?

  1. Oct 13, 2015 #1
    Is it theoretically/mathematically possible for light waves to be red-shifted so much that it's amplitude is equal to zero?
     
  2. jcsd
  3. Oct 13, 2015 #2
    The shift in frequency is unrelated to the amplitude of the wave as far as I know.
     
  4. Oct 14, 2015 #3

    mfb

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    2016 Award

    Staff: Mentor

    You would need an infinite redshift factor which is unphysical.
    If space expands by a factor of 10, the energy density goes down by a factor of 10000, so your amplitude goes down by a factor of 100.
    If space expands by another factor of 10, the energy density goes down by another factor of 10000, so your amplitude goes down by another factor of 100.
    ...
    It will never be zero.
     
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