electromagnetism
- Noun:
- The branch of physics concerned with electromagnetic phenomena: "Electromagnetism" is the scientific study of the interactions between electric charges and magnetic fields, and how they generate forces and waves, including light.
- Magnetism produced by an electric current: "Electromagnetism" also refers to the magnetic force or field that is created by the flow of an electric current.
- Noun:
- The principles of electromagnetism are fundamental to understanding how electric motors work.
- The discovery of electromagnetism unified the studies of electricity and magnetism into a single theory.
"Classical electromagnetism": The theory of electromagnetism as described by Maxwell's equations, which does not include quantum effects.
- Classical electromagnetism successfully describes the behavior of radio waves and circuits.
"Quantum electromagnetism": The quantum field theory describing the electromagnetic interaction, also known as Quantum Electrodynamics (QED).
- Quantum electromagnetism explains the interaction between light and matter at the most fundamental level.
Electromagnetic (adj): Relating to or involving electromagnetism.
- An electromagnetic field surrounds any moving electric charge.
Electromagnet (n): A type of magnet in which the magnetic field is produced by an electric current.
- The junkyard uses a powerful electromagnet to lift scrap metal.
- Electrodynamics: Often used interchangeably with electromagnetism, though it can more specifically refer to the study of the dynamics of electric and magnetic fields and their interactions with charged particles.
"Electromagnetic force": One of the four fundamental forces of nature, responsible for interactions between charged particles.
- The electromagnetic force holds atoms and molecules together.
"Electromagnetic spectrum": The full range of frequencies of electromagnetic radiation, from radio waves to gamma rays.
- Visible light is only a small part of the electromagnetic spectrum.
"Electromagnetic induction": The process of generating an electric current by moving a conductor through a magnetic field or by changing a magnetic field.
- Electromagnetic induction is the principle behind electric generators and transformers.
- the branch of physics concerned with electromagnetic phenomena
- magnetism produced by an electric current
- electromagnetism was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it