electromagnetism

(noun)

A unified fundamental force that combines the aspects of electricity and magnetism and is one of the four fundamental forces. (technically it can be unified with weak nuclear to form electroweak) Its gauge boson is the photon.

Related Terms

Examples of electromagnetism in the following topics:

  • The Production of Electromagnetic Waves

    • Electromagnetic waves are the combination of electric and magnetic field waves produced by moving charges.
    • Electromagnetic radiation, is a form of energy emitted by moving charged particles.
    • The creation of all electromagnetic waves begins with a charged particle.
    • These and many more such devices use electromagnetic waves to transmit data and signals.
    • Electromagnetic waves are a self-propagating transverse wave of oscillating electric and magnetic fields.

  • Electromagnetic Spectrum

    • The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.
    • The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.
    • The electromagnetic spectrum of an object has a different meaning: it is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.
    • Whenever electromagnetic waves exist in a medium with matter, their wavelength is decreased.
    • The behavior of electromagnetic radiation depends on its wavelength.

  • Solenoids, Current Loops, and Electromagnets

    • Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets.
    • Electromagnetism is the use of electric current to make magnets.
    • These temporarily induced magnets are called electromagnets.
    • Combining a ferromagnet with an electromagnet can produce particularly strong magnetic effects.
    • An electromagnet creates magnetism with an electric current.

  • Introduction to Light Energy

    • The sun emits an enormous amount of electromagnetic radiation (solar or light energy).
    • The electromagnetic spectrum is the range of all possible frequencies of radiation .
    • The electromagnetic spectrum shows several types of electromagnetic radiation originating from the sun, including X-rays and ultraviolet (UV) rays.
    • Each type of electromagnetic radiation travels at a particular wavelength.
    • The sun emits energy in the form of electromagnetic radiation.

  • Maxwell's Predictions and Hertz' Confirmation

    • Maxwell's prediction of the electromagnetic force was confirmed by Hertz who generated and detected electromagnetic waves.
    • The propogation of an electromagnetic wave as predicted by Maxwell and confirmed by Hertz.
    • The apparatus used by Hertz in 1887 to generate and detect electromagnetic waves.
    • An RLC circuit connected to the first loop caused sparks across a gap in the wire loop and generated electromagnetic waves.
    • Explain how Maxwell's prediction of the electromagnetic force was confirmed by Hertz

  • The Electromagnetic Spectrum

    • This electromagnetic spectrum ranges from very short wavelengths (including gamma and x-rays) to very long wavelengths (including microwaves and broadcast radio waves).

  • Photon Energies of the EM Spectrum

    • The electromagnetic (EM) spectrum is the range of all possible frequencies of electromagnetic radiation.
    • The electromagnetic (EM) spectrum is the range of all possible frequencies of electromagnetic radiation .
    • Maxwell's equations predicted an infinite number of frequencies of electromagnetic waves, all traveling at the speed of light.
    • This was the first indication of the existence of the entire electromagnetic spectrum.
    • The last portion of the electromagnetic spectrum was filled in with the discovery of gamma rays.

  • Energy and Momentum

    • Electromagnetic waves have energy and momentum that are both associated with their wavelength and frequency.
    • Electromagnetic radiation can essentially be described as photon streams.
    • Planck theorized that "black bodies" (thermal radiators) and other forms of electromagnetic radiation existed not as spectra, but in discrete, "quantized" form.
    • In other words, there were only certain energies an electromagnetic wave could have.
    • Relate energy of an electromagnetic wave with the frequency and wavelength

  • Ferromagnets and Electromagnets

    • There are two type of magnets—ferromagnets that can sustain a permanent magnetic field, and electromagnets produced by the flow of current.
    • In the second class of magnets—known as electromagnets—the magnetic field is generated through the use of electric current.
    • In an electromagnet the magnetic field is produced by the flow of electric current.
    • This is called a ferromagnetic-core or iron-core electromagnet.
    • A simple electromagnet consisting of a coil of insulated wire wrapped around an iron core.

  • Microwaves

    • Microwaves are electromagnetic waves with wavelengths ranging from one meter to one millimeter (frequencies between 300 MHz and 300 GHz).
    • Super high frequency (SHF) is the designation for electromagnetic wave frequencies in the range of 3 GHz to 30 GHz.
    • Microwaves are the highest-frequency electromagnetic waves that can be produced by currents in macroscopic circuits and devices.
    • The electromagnetic spectrum, showing the major categories of electromagnetic waves.
    • Distinguish three ranges of the microwave portion of the electromagnetic spectrum