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Homework Help: Xray radiation

  1. Feb 4, 2014 #1
    1. The problem statement, all variables and given/known data
    The minimum wavelength observed in x-ray radiation is 1.23 angstroms. (1 angstrom = 10E-10m). What is the KE, in eV, of the primary electron hitting the target?

    2. Relevant equations
    eV = hc/λ
    and since all the potential energy becomes kinetic...
    is the answer simply
    KE = hc/λ?
    hc = 1240 nm*ev and λ=12.3nm
  2. jcsd
  3. Feb 4, 2014 #2
    If there is nothing else mentioned, I too think that KE = hc/λ.
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