electromagnetic radiation
electromagnetic radiation Energy in the form of transverse waves. It travels through free space at close to the speed of light,
c.300,000km (186,000mi)/sec. In general, electromagnetic waves are set up by electrical and magnetic vibrations that occur universally in
atoms. The
wavelength of electromagnetic radiation varies inversely with the
wave frequency. These waves make up the
electromagnetic spectrum, which includes (in ascending order of frequency):
radio waves (including
microwaves),
infrared waves,
light,
ultraviolet radiation,
X-rays, and
gamma radiation. They can undergo
reflection,
refraction,
interference,
diffraction, and polarization. In some cases, such as the
photoelectric effect, electromagnetic radiation behaves in a way that can only be explained by assuming the radiation is composed of quanta of energy (photons). See also
quantum theory
Cite this article
Pick a style below, and copy the text for your bibliography.
|
SC accepts PIL for regulating levels of electromagnetic radiations
News Wire article from: The Hindustan Times; 5/12/2006; 557 words
; ...of non-ionizing electromagnetic radiations emitted...shielded against such radiations while in western...such non ionizing radiation while so far India...control ionizing radiations. Many foreign countries...objectionable levels of radiation emitted by electronic...Excess exposure to ...
|
|
California Inventors Develop Electromagnetic Radiation Emitting Toothbrush
News Wire article from: US Fed News Service, Including US State News; 8/28/2007; 623 words
; ...have developed an electromagnetic radiation emitting toothbrush...teeth having an electromagnetic radiation emitting...electromagnetic radiation and providing a...emits a range of electromagnetic radiation and formulating...
|
|
Electromagnetic Radiation: PC software makes documentation easier on-line operation for remote-controlled measurements.
M2 Presswire; 12/12/2005; 700+ words
; ...Test Solutions: Electromagnetic Radiation: PC software makes...measurements of electromagnetic radiation, which...professional measurement of electromagnetic fields. Narda Safety...settable calibrated radiation measuring devices...
|
|
Electromagnetic radiation and health risks: cell phones and microwave radiation in New Zealand.
Magazine article from: Journal of Environmental Health; 7/1/1996; ; 700+ words
; ...charges gives rise to electromagnetic radiation. This radiation...continuum, called the electromagnetic spectrum. At one...and non-ionizing radiation (frequencies below...present. Measuring Electromagnetic Radiation The electric...
|
|
Electromagnetic radiation and cancer: recent developments.
Magazine article from: Trial; 7/1/1995; ; 700+ words
; ...regarding the connection between electromagnetic radiation (EMR) exposure and cancer...heat are the only forms of electromagnetic energy that humans can perceive...are blind to much of the electromagnetic energy spectrum, it is...
|
|
Risky rays. (electromagnetic radiation)
Magazine article from: Current Health 2, a Weekly Reader publication; 10/1/1991; ; 700+ words
; The electromagnetic force is with you. It surrounds...information, and sounds. Electromagnetic energy, or radiation, fills the environment. Some...life. Some is harmful. All electromagnetic energy consists of vibrating...
|
 "The Economist (US)")
|
How much do a few hertz hurt? (electromagnetic radiation may cause cancer; includes related article on Heinrich Hertz and James Clerk Maxwell)
Magazine article from: The Economist (US); 4/16/1988; 700+ words
; ELECTROMAGNETIC radiation is here, there and...light, there are also electromagnetic waves given off by...term exposure to ELF radiation. Two recent studies...measurements of the electromagnetic fields near each front...
|
|
|
Wisconsin Inventors Develop Electromagnetic Radiation Assembly
News Wire article from: US Fed News Service, Including US State News; 2/12/2007; 491 words
; ...Wis., have developed an electromagnetic radiation assembly. An abstract of...Trademark Office, said: "An electromagnetic radiation assembly is described...which visibly discernable electromagnetic radiation forming a signal...
|
|
New Waveguard Product First to Absorb Potentially Harmful Electromagnetic Radiation From Cellular Phones.
Business Wire; 6/22/1998; 700+ words
; ...potentially harmful electromagnetic radiation waves while...electromagnetic radiation. Cellular...electromagnetic radiation have arisen...exposed to electromagnetic radiation from...British bio-electromagnetic scientist Roger...
|
|
|
Swedish Inventors Develop Electromagnetic Radiation Directing Optical Component
News Wire article from: US Fed News Service, Including US State News; 10/31/2007; 540 words
; ...Sweden, have developed electromagnetic radiation directing optical component...component directs first electromagnetic radiation incident on the...first direction and second electromagnetic radiation incident on the...
|
|
electromagnetic radiation
Book article from: The Columbia Encyclopedia, Sixth Edition
electromagnetic radiation energy radiated...those of gamma radiation , result from...electromagnetic radiation include: electric...other forms of electromagnetic radiation may...individual quantum of electromagnetic radiation is...
|
|
Radiation, Electromagnetic Radiation Injury
Book article from: World of Forensic Science
Radiation, Electromagnetic Radiation Injury An...scene. One example is electromagnetic radiation. Any nuclear...passage of ionizing radiation (e.g., neutrons...systems-generated electromagnetic pulse (SGEMP...
|
|
|
Electromagnetic Weapons, Biochemical Effects
Book article from: World of Forensic Science
...Exposure to electricity and electromagnetic radiation, while relatively uncommon...debilitating effects of electromagnetic radiation has continued up to the...source. Shorter wavelength electromagnetic radiation produces different effects...
|
|
Electromagnetic Spectrum
Book article from: World of Earth Science
...frequencies or wavelengths of electromagnetic radiation, ranging from long wavelength...discovery of high-energy electromagnetic radiation in the form of x rays...calculation of the energy of electromagnetic radiation in all portions of the...
|
|
electromagnetic spectrum
Book article from: A Dictionary of Astronomy
electromagnetic spectrum The complete range of electromagnetic radiation. From longest to shortest wavelengths, the electromagnetic spectrum consists of radio waves (10 5 –10 -3 m), infrared waves (10 -3 – 10 -6 m...
|
