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Homework Help: Pchem -- de Brogile relation question phrasing...

  1. Sep 7, 2015 #1
    Electrons are accelerated in an electrical potential of: ΔΦ = 105 V and are focused on a biological specimen. Assume that the kinetic energy of an electron is given by eΔΦ where e is the charge of an electron.
    What is the smallest possible object that can be resolved assuming that the theoretical resolution is given by the de Brogile wavelength?

    My problem is actually due to the phrasing of the question itself; I got something like this:
    Ek = eΔΦ = 1/2mv2 ≡ p2/2m
    then p = (2meΔΦ)(1/2) and from there get
    λ= h/p or λ = h/(2meΔΦ)(1/2)

    But I dont know if this was what my professor is looking for because of the phrasing, thoughts?
  2. jcsd
  3. Sep 8, 2015 #2


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