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  1. Electromotive force | Definition, Symbols, & Units | Britannica

    This article seeks to provide a qualitative understanding of electromagnetism as well as a quantitative appreciation for the magnitudes associated with electromagnetic phenomena.

  2. Radiation | Definition, Types, Effects, & Facts | Britannica

    Nov 4, 2025 · The first type constitutes the spectrum of electromagnetic radiation that includes radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X rays, and gamma rays, as well as …

  3. Electromagnetic radiation | Spectrum, Examples, & Types | Britannica

    5 days ago · Electromagnetic radiation, in classical physics, the flow of energy at the speed of light through free space or through a material medium in the form of the electric and magnetic fields that …

  4. Electromagnetism | Definition, Equations, & Facts | Britannica

    Nov 14, 2025 · The mathematical equations formulated by Maxwell incorporated light and wave phenomena into electromagnetism. He showed that electric and magnetic fields travel together …

  5. Electromagnetic field | Electricity, Magnetism, Waves | Britannica

    Nov 20, 2025 · Electromagnetic field, a property of space caused by the motion of an electric charge. A stationary charge will produce only an electric field in the surrounding space.

  6. Electromagnetic induction | physics | Britannica

    Nov 6, 2025 · electromagnetic induction, in physics, the induction of an electromotive force in a circuit by varying the magnetic flux linked with the circuit. See Faraday’s law of induction.

  7. Electromagnetic radiation - Spectrum, Wavelengths, Properties

    Dec 9, 2025 · Electromagnetic radiation is produced whenever a charged particle, such as an electron, changes its velocity—i.e., whenever it is accelerated or decelerated. The energy of the …

  8. Light - Electromagnetic, Wavelength, Spectrum | Britannica

    Nov 25, 2025 · In his formulation of electromagnetism, Maxwell described light as a propagating wave of electric and magnetic fields. More generally, he predicted the existence of electromagnetic radiation: …

  9. Electromagnetic spectrum | Definition, Diagram, & Uses | Britannica

    Nov 13, 2025 · The electromagnetic spectrum comprises the span of all electromagnetic radiation and consists of many subranges, commonly referred to as portions, such as visible light or ultraviolet …

  10. Faraday’s law of induction - Britannica

    Nov 19, 2025 · electromagnetic induction, in physics, the induction of an electromotive force in a circuit by varying the magnetic flux linked with the circuit. See Faraday’s law of induction.