Modern Physics Test 3

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mathprodigy20
ID:
75297
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Modern Physics Test 3
Updated:
2011-03-28 10:12:53
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Modern Physics Quantum Transitions Selection Rules
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Facts for Modern Physics
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  1. What are the restrictions on the j quantum number in a radiative transition?
    Δj = -1, 0, 1
  2. What is the binding energy for hydrogen to the nearest 0.1 eV?
    13.6 eV
  3. Emission of radiation by a change of bound electron energy levels is generally more probable if the wave functions are
    • One even and one odd
    • Somewhat similar
  4. True or False: A state which is a combination of states with different energies can be a stationary state.
    False
  5. What can we say about fermions?
    • An electron is an example
    • A proton is an example
    • No more than one particle can be in exactly the same state
    • They have half-integral spin
  6. What are the possible values of m for a particle with angular momentum quantum number l?
    m = -l, … , l
  7. What are the restrictions on the m quantum number in a radiative transition?
    Δm = -1, 0, 1
  8. How does the Zeeman shift of an energy level depend on the magnetic field?
    It is proportional.
  9. Which of the following has the greatest electron affinity?
    Iron (middle column of the periodic table in the fourth row)
    Fluorine (second to last column of the periodic table)
    Carbon (second row of the periodic table, near the middle)
    Sodium (left column of the periodic table)
    Fluorine (second to last column of the periodic table)
  10. Compare the energy shifts of a level in a magnetic field for equal values of m and ms.
    The shift due to ms is twice as big as the shift due to m.
  11. What can we say about bosons?
    • A photon is an example
    • Wave function is symmetric under an exchange of particles
  12. What are the restrictions on the l quantum number in a radiative transition?
    Δ l = ± 1
  13. What are the restrictions on the n quantum number in a radiative transition?
    No restrictions
  14. What are the restrictions on the S quantum number in a radiative transition?
    Δ S = 0
  15. What is the degeneracy of the n=3 level in hydrogen?
    18

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