Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Energy having both the form of electromagnetic waves and the form of a stream of photons and traveling at the speed of light in a vacuum. The entire range of frequencies and wavelengths of electromagnetic radiation makes up the electromagnetic spectrum.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Radiation (
quantized asphotons ) consisting ofoscillating electric andmagnetic fieldsoriented perpendicularly to each other, moving through space.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
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