region of electromagnetic spectrum

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• Electromagnetic spectrum — The electromagnetic (EM) spectrum is the range of all possible electromagnetic radiation frequencies. [cite web|url=http://imagine.gsfc.nasa.gov/docs/dict ei.html#em spectrum|title=Imagine the Universe! Dictionary] The electromagnetic spectrum… …   Wikipedia

• electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium

• Electromagnetic radiation — Electromagnetism Electricity · …   Wikipedia

• spectrum — noun 1 range of light waves, etc. ADJECTIVE ▪ visible ▪ These wavelengths correspond to red in the visible spectrum. ▪ Beyond the red end of the visible light spectrum is infrared. ▪ colour/color, electromagnetic …   Collocations dictionary

• Visible spectrum — White light is dispersed by a prism into the colors of the optical spectrum. The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye …   Wikipedia

• Emission spectrum — The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted by the element s atoms or the compound s molecules when they are returned to a lower energy state. Each element s …   Wikipedia

• radio spectrum — noun the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television (Freq. 1) • Syn: ↑radio frequency spectrum • Hypernyms: ↑spectrum • Part Holonyms: ↑electromagnetic… …   Useful english dictionary

• microwave region — Commonly, that region of the radio spectrum between approximately 1000 MHz and 300,000 MHz. Corresponding wavelengths are 30 cm to 1 mm. The limits of the microwave region are not clearly defined, but in general they are considered to be the… …   Aviation dictionary

• radio spectrum — noun Date: 1929 the region of the electromagnetic spectrum spanning the radio frequency range …   New Collegiate Dictionary

• H II region — ▪ astronomy also spelled  H ii region,   in astronomy, interstellar matter consisting of ionized hydrogen atoms. Such regions occur as hot, ionized gaseous clouds, sometimes called emission nebulae. The energy that is responsible for ionizing and …   Universalium

• Pulsed Electromagnetic Field Therapy — Drolet s 1990 Rhumart System, a PEMF device. Pulsed Electromagnetic Field Therapy (PEMFT), also called Pulsed Magnetic Therapy, is a reparative technique most commonly used in the field of orthopedics for the treatment of non union fractures,… …   Wikipedia