Suppose that there are initially only alpha_z(alpha spin state along z-axis) state electrons in the chamber.
a. When they are sent through a Stern - Gerlach analyzer to measure S_x(spin momentum along x-axis), what values will be found? with what probabilities will these values occur?
b. If the electrons after S_x measured are sent through a Stern - Gerlach analyzer to measure S_z(spin momentum along z-axis) again, what values will be found? with what probabilities will these values occur?