Electromagnetism: Super Fast Energy Waves

 



The electromagnetic force is referred to as electromagnetism. It is the joining of the electrostatic force and the magnetic force.  In the 1940s, It was explained as quantum electrodynamics or QED. In this understanding, the electromagnetic force is transferred by particles of light called photons.

The relationship between electricity and magnetism is about the electrical charge and it’s motion. The electrostatic force causes changes to exert forces on each other in a relationship that is similar to gravity, yet far more powerful. It’s an inverse Square law, however, the intensity is not based on the mass of objects, but instead, the charge. 

The electron contains a negative electrical charge, while the proton (In an atomic nucleus) has a positive charge. Historically, electricity is noted as the flow of electrons (negative charge) Through a wire. This flow is called the electric current.

A wire with an electric current flowing through it creates a magnetic field. Similarly when a magnet is moved near a wire, it causes current to flow. This is the basis of nearly all power generators.

In the 1800s, James Maxwell reported that electromagnetism was a force depicted as waves Of energy moving through space. One key to Maxwell theories is that the electromagnetic force moved at the speed of light, Maxwell predicted from his theory that these waves were in the form of light— long before the photon was even mentioned! 

Quantum electrodynamics holds onto this relationship between electromagnetism and light because in QED the information about the force is transferred between two charged particles (or magnetic particles) by another particle- a photon- or Particle of light. Physicists agree that the electromagnetic force is mediated by a photon! 


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