What are magnetic fields and what is string theory?
Electromagnetism is one of the fundamental forces, it includes anything to do with magnets, electricity and even light. The messenger particle (the particle that does all the work) is the photon. An electro-magnetic field is a field created by electrically charge objects such that any object in this field is affected by it in some way. The energy transferred in these fields are carried by packets of energy (the basis of quantum mechanics) governed by the equation E = hv where h is Planck’s constant and v is the frequency of the messenger particle or photon. It’s hard to give a concise explanation without more precise information, there’s a lot more to it than this. As for string theory, you most probably know that atoms consist of protons, electrons and neutrons and you may know that protons and neutrons consist of quarks and gluons (weak and strong forces). String theory says that these quarks are made of tiny vibrating strings (electrons consist of strings too). Take a look at the el
