Electromagnetic Radiation
The emanation of an electromagnetic field from a source through space.
The electromagnetic wave consists of perpendicular oscillations in the electric and magnetic fields, moving at a speed of 2.99792458×108 ms-1 in a vacuum away from the source.
Examples: gamma rays, x-rays, ultraviolet light, visible light, infrared radiation, and radio waves are all electromagnetic waves.
See also: Electromagnetic Field.
Subjects: Electromagnetism Electronics