I believe this delves into relativistic physics so I put this here. If I am incorrect I apologize. I've been learning about magnetic fields and how they are generated by moving charges. If a charge is moving at some arbitrary speed it generates a magnetic field. This is what I've been taught. So my question is this, what happens to the magnetic field when you move at the same speed as the particle and observe it? Because according to your perspective the particle wouldn't be moving and so (according to what I've been taught) it shouldn't be generating a magnetic field. But from the perspective of a person moving at speeds lower than the particle it would appear to generate a magnetic field. Does the magnetic field disappear to the person moving at the same speed as the charged particle? And if so then where does it go? If not then why not? If to the person moving at the same speed as the charged particle observes a magnetic field, this would imply that there is an absolute rest at which there is no magnetic field generated. This I know has been shown to be incorrect by Relativistic physics because according to it there is no absolute rest. So in short, what is going on in this situation? Another quick question having to do with this. If you have a charge that is at rest but you start moving away from it. Then from the relativistic point of view you cannot tell whether it is you who is moving or the charge. So would a magnetic field be generated as you move away from the charge?