With the addition of a beam stopper, this experiment's apparatus can act as a filter.
One modification of the apparatus used for this experiment, which was designed by I. I. Rabi, is the basis of MRI while a further modification is used in atomic clocks. With the addition of a beam stopper, this experiment's apparatus can act as a filter. Three such filters placed at successive 90 degree angles will allow a beam to pass, while removing the middle filter will stop the beam, demonstrating that the filter redefines "up." Originally, a beam of silver atoms was used, and the two peaks observed conflicted with the classical expectation. For 10 points, name this 1922 experiment demonstrating that atoms and electrons have quantized spin.
One modification of the apparatus used for this experiment, which was designed by I. I. Rabi, is the basis of MRI while a further modification is used in atomic clocks.
the {Stern-Gerlach} Experiment