What is electromagnism?

Answer 1

Electromagnetism is a force of nature. It is responsible for all electric and magnetic phenomena such as electricity, magnets, making materials solid, chemical reactions, fire, and almost everything else in daily life except for radioactivity and gravity.

On a deeper level is it associated with a local phase symmetry of nature. This means that one can change the wavefunction of a particle at every point in time or space by a phase factor and the laws of nature would remain the same. Physicists call this the U(1)-gauge symmetry of the Standard Model.

Answer 2

Electromagnetism is a fundamental force in nature that manifests as the interaction between electric charges and magnetic fields. It describes how charged particles create electric fields and interact with each other through the exchange of photons, resulting in electromagnetic forces that govern the behavior of particles in atoms, molecules, and macroscopic objects. It plays a crucial role in many everyday phenomena, such as electricity, magnetism, and light.