Confusion and/or difficulty speaking clearly or coherently (not making any sense). 1  Fainting â Syncope. 2  Fainting from a heart rhythm disorder is more likely to happen suddenly and without warning than Fainting from other causes, such as dehydration or low blood sugar.
Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation. Electromagnetic radiation can be described in terms of a stream of mass-less particles, called photons, each traveling in a wave-like pattern at the speed of light.
Definition of ELECTROMAGNETIC RADIATION. : energy in the form of electromagnetic waves; also: a series of electromagnetic waves.See electromagnetic radiation defined for kids. ADVERTISEMENT. energy in the form of electromagnetic waves; also: a series of electromagnetic waves. See electromagnetic radiation defined for kids.