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electromagnetic spectrum
(redirected from EM spectrum)

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electromagnetic spectrum

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The spectrum of electromagnetic waves ranges from low-frequency radio waves to high-frequency gamma …
(credit: © Merriam-Webster Inc.)
Total range of frequencies or wavelengths of electromagnetic radiation. The spectrum ranges from waves of long wavelength (low frequency) to those of short wavelength (high frequency); it comprises, in order of increasing frequency (or decreasing wavelength): very-low-frequency to ultrahigh-frequency radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. In a vacuum, all waves of the electromagnetic spectrum travel at the same speed: 299,792,458 m/sec (186,282 mi/sec).

electromagnetic spectrum [i¦lek·trō·mag′ned·ik ′spek·trəm]
(electromagnetism)
The total range of wavelengths or frequencies of electromagnetic radiation, extending from the longest radio waves to the shortest known cosmic rays.
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EMI can occur throughout the EM spectrum from 0 Hz to 20 GHz or higher frequencies.
Quieting the EMI racket: wireless mesh networks can ensure data ... by Wilkinson, Jeff / Tooling & Production
Whereas other EM spectrum wavelengths (such as the much longer radio waves) pass through water, a 9.
Healing with electromedicine and sound therapies, Part two by Sylver, Nenah / Townsend Letter
As more analysts become accustomed to the usefulness of the entire EM spectrum, GEOINT will evolve from imagery interpretation to material analysis, and all data will possess geospatial metadata for quick referencing within a common operating picture.
A new image for geospatial intelligence by Ware, Jared L. / Military Intelligence Professional Bulletin
 
 
 
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