Definitions for electromagnetic radiation

This page provides all possible meanings and translations of the word electromagnetic radiation

Random House Webster's College Dictionary

electromagnet′ic radia′tion(n.)

  1. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

    Category: Physics

Origin of electromagnetic radiation:

1950–55

Princeton's WordNet

  1. electromagnetic radiation, electromagnetic wave, nonparticulate radiation(noun)

    radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge

Wiktionary

  1. electromagnetic radiation(Noun)

    Radiation (quantized as photons) consisting of oscillating electric and magnetic fields oriented perpendicularly to each other, moving through space.

Freebase

  1. Electromagnetic radiation

    Electromagnetic radiation is a form of energy emitted and absorbed by charged particles which exhibits wave-like behavior as it travels through space. EMR has both electric and magnetic field components, which stand in a fixed ratio of intensity to each other, and which oscillate in phase perpendicular to each other and perpendicular to the direction of energy and wave propagation. In a vacuum, electromagnetic radiation propagates at a characteristic speed, the speed of light. Electromagnetic radiation is a particular form of the more general electromagnetic field, which is produced by moving charges. Electromagnetic radiation is associated with EM fields that are far enough away from the moving charges that produced them that absorption of the EM radiation no longer affects the behavior of these moving charges. These two types or behaviors of EM field are sometimes referred to as the near and far field. In this language, EMR is merely another name for the far-field. Charges and currents directly produce the near-field. However, charges and currents produce EMR only indirectly—rather, in EMR, both the magnetic and electric fields are associated with changes in the other type of field, not directly by charges and currents. This close relationship assures that the electric and magnetic fields in EMR exist in a constant ratio of strengths to each other, and also to be found in phase, with maxima and nodes in each found at the same places in space.

Dictionary of Military and Associated Terms

  1. electromagnetic radiation

    Radiation made up of oscillating electric and magnetic fields and propagated with the speed of light. Includes gamma radiation, X-rays, ultraviolet, visible, and infrared radiation, and radar and radio waves.

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