Quantum physics (quantum theory, quantum mechanics)

Stern - Gerlach experiment - 1
magnetic dipole moment associated with angular momentum
magnetic dipole moment of atoms and quantization of angular
momentum direction anticipated from Bohr-Sommerfeld atom
model
magnetic dipole in uniform field magnetic field feels torque,
but no net force
in non-uniform field there will be net force deflection
extent of deflection depends on
• non-uniformity of field
• particle’s magnetic dipole moment
• orientation of dipole moment relative to
mag. field
Predictions:
• Beam should split into an odd number of
parts (2l+1)
• A beam of atoms in an s state
(e.g. the ground state of hydrogen,
n = 1, l = 0, m = 0) should not be split.
S
N
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