<table align="right"><tr><td><ul> #MAGIC SubpageIndex id=Physics/ </ul></td></tr></table> ~~~Imported from [Wikipedia:Quantum mechanics Wikipedia] on 2009-02-22~~~ '''Quantum''' mechanics is a set of principles underlying the most fundamental known description of all physical systems at the microscopic scale (at the Videx:atomic level). Notable amongst these principles are both a dual [Videx:wave wave]-like and particle-like behavior of Videx:matter and Videx:radiation, and prediction of probabilities in situations where classical Media:physics predicts certainties. Classical physics can be derived as a good approximation to quantum physics, typically in circumstances with large numbers of Videx:particles. #MAGIC Videx q=quantum