Exercise 3.2-3 Electronic Polarization

Look at an atom with atomic number z.
How large is the distance d between the (center of gravity) of the positive and negative charges for reasonable field strengths and atomic numbers, e.g. the combinations of
  • 1 kV/cm
  • 100 kV/cm
  • 10 MV/cm
  • , the last one being about the ultimate limit for the best dielectrics there are,
and
  • z = 1 (H, Hydrogen)
  • z = 50 (Sn, (= tin), ...)
  • z = 100 (?)
Calculate the "spring constant" and from that the resonance frequency of the "elctron cloud" (assume the nucleus to be fixed in space).
 

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