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B What is the shortest wavelength of all? >0 or h?

  1. Apr 25, 2017 #1
    Theoretically of course, what is the shortest wavelength of all? Is it the size of the Planck's constant or just anything over zero?
  2. jcsd
  3. Apr 25, 2017 #2
    Depends on what framework you are working with. Quantum mechanics has a minimum limit, which is the Planck length, General Relativity has smooth space and infinitely divisible energy, so gravity waves can be any size (theoretically.)
  4. Apr 25, 2017 #3


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    There is no minimum wavelength. Not even the Planck length. In the frame of reference of an observer traveling at a high velocity opposite the direction the wave is traveling, the wave would have a significantly shorter wavelength.
  5. Apr 26, 2017 #4


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    You should not confuse the Planck length (which has units of distance) with Planck constant (which has units of angular momentum).
  6. Apr 29, 2017 #5
    With De Broglie's formula a fast moving heavy particle would have a wavelength smaller than Plank's length. (yeah not constant :p)
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