Modern Physics Test 3

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What are the restrictions on the j quantum number in a radiative transition?

Δj = -1, 0, 1
What is the binding energy for hydrogen to the nearest 0.1 eV?

13.6 eV
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
True or False: A state which is a combination of states with different energies can be a stationary state.

False
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
What are the possible values of m for a particle with angular momentum quantum number l?

m = -l, … , l
What are the restrictions on the m quantum number in a radiative transition?

Δm = -1, 0, 1
How does the Zeeman shift of an energy level depend on the magnetic field?

It is proportional.
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)
Compare the energy shifts of a level in a magnetic field for equal values of m and m_s.

The shift due to m_s is twice as big as the shift due to m.
What can we say about bosons?
- A photon is an example
- Wave function is symmetric under an exchange of particles
What are the restrictions on the l quantum number in a radiative transition?

Δ l = ± 1
What are the restrictions on the n quantum number in a radiative transition?

No restrictions
What are the restrictions on the S quantum number in a radiative transition?

Δ S = 0
What is the degeneracy of the n=3 level in hydrogen?

18

Author

mathprodigy20

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Card Set

Modern Physics Test 3

Description

Facts for Modern Physics

Updated

2011-03-28T14:12:53Z

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