About Electromagnetic Radiation


Electromagnetic radiation (EM radiation or EMR) is classically radiant energy consisting of electromagnetic waves, which are synchronised oscillations of electric and magnetic fields that propagate at the speed of light through a vacuum.

 

EMR Spectrum 1000 pix for website

Thank you to Dojo Interactive

Electromagnetic waves can be characterised by either the frequency or wavelength of their oscillations to form the electromagnetic spectrum, which includes, in order of increasing frequency and decreasing wavelength: extremely low frequency (ELF), very low frequency (VLF), radio waves, microwaves, infrared radiation, visible light (the only part of the spectrum clearly visible to the human eye), ultraviolet radiation, X-rays and gamma rays. Biological interaction has been shown to occur in all areas of this broad spectrum of frequencies.

This group, PHIRE has been assembled to primarily focus on the non-ionising portions of the spectrum, that isĀ  sub ELF radiation up to visible light, and the radiofrequency portion deserves great attention presently, as it is this portion that is rapidly escalating due to increased use of devices such as mobile phones and Wi-fi.

Author of page Dr. Erica Mallery-Blythe, see credits for graphics owners. If you wish to use or discuss any content from this site, please contact the relevant author / owner either directly or via ‘contact’ above. A link to the references for each section will also be coming soon.