i have some troubles to understand the lamor precession properly and i need your help to correct my errors: so in order to get the lamor precession: afaik you need something that causes a magnetic moment, e.g. an electron with spin or angular momentum. then you need a homogenous magnetic field and it is necessary, that the direction of the field and the direction of the magnetic moment are not exactly the same if you want to measure at least something. now, there is a torque, that leads to this movement with constant angular velocity is this right so far? but: at this point i heard, that it has something to do with diamagnetism and this is what actually confuses me. diamagnetism means, that the body creates a magnetic field that is opposed to the external magnetic field. but if this torque that is caused by the lamor precession leads to an additional magnetic field, how do you know, that it is always opposed to the external one? and which equation gives me the internal magnetic field, that is caused by the lamor precession? sorry for my english, i am still practising.