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Momentum of an electron beam

  1. Jan 13, 2009 #1
    I'm just looking at some Quantum and Atomic Physics exam papers, and I've come across a question I can't do. It's probably simple but i'm just not seeing it.

    Estimate the minimum momentum necessary for a beam of electrons to probe any
    possible structure within a molecule whose dimension is no greater than 100 nm
    (100 × 10−9 m).

    Thanks :)
  2. jcsd
  3. Jan 13, 2009 #2


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    Electrons have a wavelength - if the wavelength is larger than the feature you aren't going to see it.
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