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This activity can also be part of a larger integrated laboratory. See the Spins Lab 1 activity page.
Estimated Time: 10 minutes
Students must convince themselves that the probability a particle coming from the oven will be measured as either spin-up or spin-down in the z-direction is $\frac{1}{2}$.
This activity is best performed after having students Introduce Themselves to the Spins Program. Now that students have familiarized with how the program works, tell them that the next step is to make sure that the program itself effectively simulates the results of the Stern-Gerlach experiment. Ask them to fill out the handout provided using the software.
Ask to make sure the students are convinced the probability is one-half. Assure them this result is what much of the future analysis of the spin-$\frac{1}{2}$ system will be based upon.
This activity is the first part of SPINS Lab 1. It is designed to precede Probabilities for Different Spin-$\frac{1}{2}$ Stern Gerlach Analyzers and the Dice Rolling Lab.
The full lab is designed to be completed in a two hour lab block, while these individual activities are designed to be integrated into a normal lecture. We prefer to use the integrated activities, rather than the lab, but both are effective methods.