Take the example of a magnetic dipole in a magnetic field. The dipole will experience a torque that will tend to align its magnetic moment with the field lines of the magnet. So why on earth is there no mention made of this torque in any of the countless descriptions of the Stern Gerlach experiment I have read??!! All the diagrams and applets I have seen show the magnetic dipole passsing through the field experiencing only deflection and no rotation!! I am tearing my hair out over this one, am I missing something?!