Alfven's Theorem

Alfvén's Theorem states that in a highly conductive fluid, like a plasma, magnetic field lines move seamlessly with the fluid itself. This means the magnetic field is "frozen" into the fluid, so as the fluid flows, the magnetic lines follow along without breaking or slipping through. This behavior is important in understanding phenomena like solar flares and the Earth's magnetosphere, where the magnetic field and the plasma interact closely. Essentially, it highlights the strong link between magnetic fields and conducting fluids, shaping the dynamics of many astrophysical and laboratory plasma systems.