Physicist: Magnetic fields are nothing more than the result of combining an electric field with the effects of relativity. In addition to creating magnetic fields, moving charges also experience force from a magnetic field that can be found using another right hand rule. So if magnetic fields are just weird relativistic effects, then where do magnetic poles, bar magnets, and whatnot come from? The more common view of the magnetic field (among physicists) is that it is merely part of a larger structure called an “electromagnetic field”. But most people would rather just work with the (illusionary) magnetic field lines than go back to basics every five minutes.