What is Quantum tunnelling?
[[File:EffetTunnel.gif|thumb|Visual of quantum tunneling]] '''Quantum tunnelling''' is a part of the [[theoretical]] branch of [[physics]] known as [[quantum mechanics]]. It states that [[electron]]s can behave like both [[Particle physics|particles]] and [[Wave (physics)|waves]], and can cancel the effects of an [[energy]] barrier if the energy barrier is thin enough, due to quantum mechanics being dependent on [[probability]]. In other words, particles can travel through walls, doors, etc. if the door or wall is thin enough. The particle&mdash;usually a [[Subatomic particle|subatomic]] or [[quark]] particle such as an electron or [[photon]]&mdash;can become a wave to focus a great deal of energy on the barrier, ultimately negating it. There is also a non-zero chance that it could be found ''inside'' the barrier. However, this only noticeably works for [[subatomic particle]]s, as the chance for [[macroscopic]] objects to do this is very, very low, small enough to not be thought about much. {{physics-stub}} [[Category:Quantum mechanics]]