Spin Quantum Number and Spin

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Spin Quantum Number and Spin
More ? Spin COMPONENT quantization
Example Electron, s ½ (fermion)
Examples s ½ s 1
(Similar for x, y components)
Example Electron, s ½ (fermion)
Implications?

• Spin angular momentum is INTRINSIC to a particle
• mass
• charge
• spin

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ConcepTest 75
4
Identical Particles, Indistinguishable Particles,
and Joint Probabilities
Slightly more/different explanation in CH 35,
Sec. 35-6
Probability for particle 1 and particle 2 to end
up in states a and b
What happens if states a and b are the same a
b?
Distinguishable particles
Identical Bosons
Identical Fermions
CONSEQUENCES
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What happens if the box is more than one
dimension?
What happens if there are more particles?
6
ConcepTest 76
What is the wavelength of this photon?
7
Fluorescence
Photon-Atom Interactions
8
Population Inversions, Metastable States, and
Lasers
9
Energy Levels in the Hydrogen Atom
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Bohr Model
Postulates?