Suppose the silver atoms in the Stern-Gerlach experiment traveled horizontally, first 1 m through the magnet and then after exiting the magnet, 1 m in a field-free region at a speed of 250 m/s. What must have been the gradient of Bz, dB/dz, in order that the beams each be deflected a maximum of 0.5 mm from the central position?

Suppose the silver atoms in the Stern-Gerlach experiment traveled horizontally, first 1 m through the magnet and then after exiting the magnet, 1 m in a field-free region at a speed of 250 m/s. What must have been the gradient of Bz, dB/dz, in order that the beams each be deflected a maximum of 0.5 mm from the central position?