Electric fields are caused by particles that have charge. Gravitational fields are caused by particles that have mass. What is the property of a particle that causes it to interact with a magnetic field?
I've read that magnetic fields are caused by charged particles that are moving in an electric field. However, since any charged particle in an electric field experiences a force on it which causes it to move, doesn't this mean that an electric field is impossible to detect without a magnetic field also being present, and vice versa? How would a magnetic field and electric field differ in this case?
I've also read that magnetism is caused by groupings of particles with the same spin state. Is this the quantum mechanical explanation, and if so then how do groupings of such particles create a magnetic field?