1. The problem statement, all variables and given/known data An open orbit in a monovalent tetragonal metal connects opposite faces of a Brillioun zone. A magnetic field is normal to the plane of the open orbit. Describe in real space the motion of the electron on this orbit in the presence of the magnetic field. 2. Relevant equations 3. The attempt at a solution I am having loads of difficulty translating what goes on in k-space to what goes on in real space. The picture in k-space is very clear, but I am just really confused about what it means. It is not even clear to me what how the velocity vector is changing!