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B Question on the Bohr atomic model and energy

  1. Jun 29, 2017 #1
    Let's say there are three states ofor energym, E1, E2 and E3, and the electron is at E1, what happens if a photon has energy E > E2-E1 ?
    Does it interact to the electron anD take it to E2 and the photon loose energy E2-E1 or it doesn't interact at ALL?
    I mean, the electron can't have an energy greater than E2 and be in state E2
     
  2. jcsd
  3. Jun 29, 2017 #2

    hilbert2

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    An electromagnetic wave can cause transitions between energy states of an atom even when it's not at exact resonance with the transition energy, but it will just as quickly cause a stimulated emission that brings the atom back to the original state. This can be shown by adding an oscillating time-dependent term in the Hamiltonian matrix of a 2-state system and solving the occupancies of the two energy states as a function of time.
     
  4. Jun 29, 2017 #3
    in general the Frank-Hertz experiment showed the discrete nature of atomic transitions. the target atoms were invisible to electrons except for the energies shown below ie for cases like;

    "
    what happens if a photon has energy E > E2-E1 ?
    Does it interact to the electron anD take it to E2 and the photon loose energy E2-E1 or it doesn't interact at ALL?"


    the fact the line widths are not infinitely narrow is prolly worthy of a different thread.

    reference;

    http://hyperphysics.phy-astr.gsu.edu/hbase/FrHz.html


    image copied from reference above;


    upload_2017-6-30_10-10-41.png
     
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