Electromagnetic radiation (or "extreme") ultraviolet. UV, with X-ray and gamma radiation, are referred to as ionizing radiation due to the ability of photons of this radiation to produce ions and free radicals in materials (including living tissue). Since such radiation can severely damage life at energy levels that produce little heating, it is considered far more dangerous (in terms of damage-produced per unit of energy, or power) than the rest of the electromagnetic spectrum. The heat ray is an application of EMR that makes use of microwave frequencies to create an unpleasant heating effect in the upper layer of the skin. A
Levitin effect Levitin effect has just only recently (2012) been replicated for the first time. Levitin effect The Levitin effect refers to the phenomenon, first documented by Dr. Daniel J. Levitin in 1994, that people – even those without musical training – tend to remember songs in the correct key. The finding stood in contrast to the large body of laboratory literature suggesting that such details of perceptual experience are lost during the process of memory encoding. In other words, laboratory experiments supported the idea that most people are incapable of any sort of absolute pitch, and thus would remember melodies with