What is "electromagnetic field"

n. (context physics English) The field of force that is due to the interaction of electric and magnetic forces of charged bodies

An electromagnetic field (also EM field) is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction. It is one of the four fundamental forces of nature (the others are gravitation, weak interaction and strong interaction).

The field can be viewed as the combination of an electric field and a magnetic field. The electric field is produced by stationary charges, and the magnetic field by moving charges (currents); these two are often described as the sources of the field. The way in which charges and currents interact with the electromagnetic field is described by Maxwell's equations and the Lorentz force law.

From a classical perspective in the history of electromagnetism, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner; whereas from the perspective of quantum field theory, the field is seen as quantized, being composed of individual particles.

Electromagnetic Field (also known as EMF, or EMF Camp) is a camping festival in the UK, held every two years, for hackers, geeks, engineers and scientists. It features talks and workshops covering a wide variety of topics. EMF is a non-profit event run entirely by a team of volunteers.

Attendees of EMF receive an electronic conference badge, funded by sponsorship, which in 2014 included an LCD screen, Arduino-compatible microcontroller, and a radio transceiver.