| electromagnetic radiation |
Fluctuations of electric and magnetic fields that depending on their frequency take the form of visible light, radio waves, or X rays, among others. The photon is the carrier of electromagnetic radiation.
출처: www.gsfc.nasa.gov/gsfc/spacesci/pictures/2003/0702...
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| electromagnetic spectrum |
a means of charting the order of radio and television signals in terms of their physical wavelength. A continuous range of frequencies in the earth
출처: www.mpbn.net/dtv/glossary.html
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| electromagnetic |
TV signals are transmitted on certain frequencies within the electromagnetic spectrum. Allocation of these frequencies is managed and regulated in the UK by the Radio Communications Agency.
출처: www.skyhomes.info/jargon_bust.html
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