electromagnetic spectrum

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electromagnetic spectrum

the range of frequencies and wavelengths associated with radiant energy.

e·lec·tro·mag·net·ic ra·di·a·tion

, electromagnetic spectrum (ĕ-lek'trō-mag-net'ik rā'dē-ā'shŭn, spek'trŭm)
Wavelike energy propagated through matter or space; varies widely in wavelength, frequency, photon energy, and properties; may be natural or artificial and includes radiowaves, microwaves, heat waves, visible light, ultraviolet light, x-rays, gamma rays, and cosmic radiation.

electromagnetic spectrum

The continuum of radiation, varying in frequency, and, correspondingly, wavelength, that includes, in order of decreasing frequency, cosmic ray photons, gamma rays, X rays, ultraviolet radiation, visible light, infrared radiation, microwaves, radio waves and heat.
Electromagnetic spectrumclick for a larger image
Fig. 142 Electromagnetic spectrum . The wavelength ranges of the electromagnetic spectrum.

electromagnetic spectrum

the entire range of wavelengths of electromagnetic radiation, most of which are not detectable by the human eye except in the visible spectrum from about 400–700 nm wavelength. Wavelengths shorter than the visible spectrum contain large quantities of energy which can be harmful to living material. See Fig. 141 . See X-RAY, GAMMA RADIATION, ULTRAVIOLET LIGHT.

electromagnetic spectrum (·lekˈ·trō·mag·neˑ·tik spekˑ·trm),

n the entire range of electromagnetic radiation that extends from the longest (radio waves) to the shortest (gamma radiation) wavelengths.

e·lec·tro·mag·net·ic ra·di·a·tion

, electromagnetic spectrum (ĕ-lek'trō-mag-net'ik rā'dē-ā'shŭn, spek'trŭm)
Wavelike energy propagated through matter or space; varies widely in wavelength, frequency, photon energy, and properties; may be natural or artificial and includes x-rays, gamma rays, and other forms.
References in periodicals archive ?
We have to realize, though, that at some point in a future conflict, as much as we desire to control the EM spectrum, the United States might have an opportunity to take action and defeat an adversary's capability that threatens our use of space.
But all these energies are sequentially connected to each other as a continuum of waves in the EM spectrum.
Simply stated, the RF spectrum is a limited, highly congested and contested natural resource that must be efficiently managed through effective EM Spectrum Operations.
Based on this characterization, we can now articulate a more succinct distinction between military IO activities that occur in the cyberspace domain and the EM spectrum.
Sadly, we cannot see the entire EM spectrum, and scientists understand that it is hard to get the public excited about a view of the universe that is either black or beyond its "range.
This month's sampling deals with EW systems that operate beyond the millimeter-wave portion of the EM spectrum - into the IR, the optical region and into the ultraviolet portion of the spectrum.
Maneuverability within and unfettered access to the EM spectrum is a key warfighting advantage, according to the Chief of Navy Operations Adm.
Jamming may be defined as the deliberate emission of electromagnetic (EM) radiation to reduce or prevent use of a portion of the EM spectrum by an enemy.
Greenert in his December 2012 Proceedings article "Imminent Domain," "our military concepts, acquisition, tactics, and training have not coherently or fully embraced the central role of the EM spectrum and computer networks in our operations.
These activities may span the full extent of the EM spectrum, from DC to light.
This will require innovative techniques and adaptive RF solutions that enable sharing of the entire EM Spectrum (including federal and non-federal frequency bands), and leverage gray and white space technology to give the Navy the EM maneuver space it requires to execute war plans under any threat condition," according to the roadmap.
Operate Forward: Enabling freedom of maneuver in the EM spectrum and assuring the ability to direct operations and coordinate actions in contested environments overseas is paramount for successful operations forward.