Magnetism: From Fridge Doors to Quantum Fields

Explore the hidden physics behind one of nature’s most familiar forces: magnetism. This Deep Dive moves from everyday magnetic attraction to the strange quantum world underneath it, where electron spin, aligned atomic domains, wavefunction behavior, and the Pauli Exclusion Principle all shape how magnets work. Along the way, we look at how Quantum Electrodynamics describes magnetic forces through the exchange of virtual photons, revealing magnetism not as a simple “pull,” but as an elegant consequence of quantum fields, symmetry, and energy. A fascinating journey from fridge magnets to the deepest rules of the universe.