Question: Stern and Gerlach observed two distinct bands of silver atoms after passing them through an inhomogeneous magnetic field. Why didn't they observe a single continuous distribution?

Multiple Choice options:

(a) Silver atoms whose magnetic moment is not aligned along the axis of measurement are blocked and cannot pass through the Stern-Gerlach analyser.

(b) The magnetic moment of a silver atom is quantised, with only two possible outcomes when measuring its component along any axis.

(c) The atoms leaving the oven all have their magnetic moment pointing in the positive z direction.