Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
1,740,948,944 visitors served.
forum mailing list For webmasters
?
New: Language forums
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

electromagnetic spectrum
(redirected from EM spectrum)

   Also found in: Medical, Wikipedia, Hutchinson 0.03 sec.

electromagnetic spectrum

Enlarge picture
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

See spectrum.


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.


How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Email
Feedback
? Mentioned in ? References in periodicals archive
 
There's an eerie, miraculous element to some views, and while the clear explanations shed light on complex phenomena, the author candidly admits that many aspects of the EM spectrum are mysteries yet to be solved by science.
Surrounding the source assembly is a clean, sodium iodide (NaI) crystal, called a scintillation detector because it gives of flashes of light (scintillates) when struck by the backscattered photons, Thus, the crystal converts photons in the gamma region of the electromagnetic (EM) spectrum into photons in the light (visible) region on the EM spectrum.
 
Encyclopedia browser? ? Full browser
 
 
Encyclopedia
?

Disclaimer | Privacy policy | Feedback | Copyright © 2009 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.