Editing Quantum mechanics (section)

== Applications ==
{{Main|Applications of quantum mechanics}}
Quantum mechanics has had enormous success in explaining many of the features of our universe, with regard to small-scale and discrete quantities and interactions which cannot be explained by [[Classical physics|classical methods]].{{refn|name= feynmanIII |group=note|See, for example, [[the Feynman Lectures on Physics]] for some of the technological applications which use quantum mechanics, e.g., [[transistor]]s (vol '''III''', pp. 14–11 ff), [[integrated circuit]]s, which are follow-on technology in solid-state physics (vol '''II''', pp. 8–6), and [[laser]]s (vol '''III''', pp. 9–13).}} Quantum mechanics is often the only theory that can reveal the individual behaviors of the subatomic particles that make up all forms of matter (electrons, [[proton]]s, [[neutron]]s, [[photon]]s, and others). [[Solid-state physics]] and [[materials science]] are dependent upon quantum mechanics.<ref name=marvincohen2008>{{cite journal |last=Cohen |first=Marvin L. |title=Essay: Fifty Years of Condensed Matter Physics |journal=Physical Review Letters |year=2008 |volume=101 |issue=25 |doi=10.1103/PhysRevLett.101.250001 |url=http://prl.aps.org/edannounce/PhysRevLett.101.250001 |access-date=31 March 2012 |bibcode=2008PhRvL.101y0001C |pmid=19113681 |page=250001}}</ref>

In many aspects, modern technology operates at a scale where quantum effects are significant. Important applications of quantum theory include [[quantum chemistry]], [[quantum optics]], [[quantum computing]], [[superconducting magnet]]s, [[light-emitting diode]]s, the [[optical amplifier]] and the laser, the [[transistor]] and [[semiconductor]]s such as the [[microprocessor]], [[medical imaging|medical and research imaging]] such as [[magnetic resonance imaging]] and [[electron microscopy]].<ref>{{cite magazine |last1=Matson |first1=John |title=What Is Quantum Mechanics Good for? |url=http://www.scientificamerican.com/article/everyday-quantum-physics/ |magazine=Scientific American |access-date=18 May 2016}}</ref> Explanations for many biological and physical phenomena are rooted in the nature of the chemical bond, most notably the macro-molecule [[DNA]].