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Multiple choice
In the 1922 Stern-Gerlach experiment, a beam of silver atoms passed through an inhomogeneous magnetic field. Classical physics predicted a continuous smear, but what was actually observed, and what did it demonstrate?
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A continuous stripe exactly as classical physics predicted
Three discrete spots, demonstrating spin-1 behavior of the valence electron
A single undeflected spot, showing the atoms carried no magnetic moment
Two discrete spots, demonstrating that spin angular momentum is spatially quantized into 2s+1 = 2 projections
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