Editing Classical physics (section)

== Overview ==
{{Classical mechanics}}
''Classical theory'' has at least two distinct meanings in physics. It can include all those areas of physics that do not make use of [[quantum mechanics]], which includes [[classical mechanics]] (using any of the [[Newton's laws of motion|Newtonian]], [[Lagrangian mechanics|Lagrangian]], or [[Hamiltonian mechanics|Hamiltonian]] formulations), as well as [[classical electrodynamics]] and [[Theory of relativity|relativity]].<ref>{{cite book |last=Morin |first=David |title=Introduction to Classical Mechanics |year=2008 |publisher=Cambridge University Press |location=New York |isbn=9780521876223 |url-access=registration |url=https://archive.org/details/introductiontocl00mori }}</ref><ref>{{cite book |last=Barut |first=Asim O. |title=Electrodynamics and Classical Theory of Fields & Particles |chapter=Introduction to Classical Mechanics |year=1980| orig-year=1964 |publisher=[[Dover Publications]] |location=New York |isbn= 9780486640389}}</ref> Alternatively, the term can refer to theories that are neither quantum or relativistic.<ref>{{cite book|last=Einstein|first=Albert|author-link=Albert Einstein|others= Robert W. Lawson |title=Relativity|year=2004|orig-year=1920|publisher=Barnes & Noble|location=New York|isbn=9780760759219}}</ref>

Depending on point of view, among the branches of theory sometimes included in classical physics are:<ref name=Krane-2019/>{{rp|2|q=These three successful theories-mechanics, electromagnetism, and thermodynamics-form the basis for what we call "classical physics."}}
* [[Classical mechanics]]
** [[Newton's laws of motion]]
** Classical [[Lagrangian mechanics|Lagrangian]] and [[Hamiltonian mechanics|Hamiltonian]] formalisms
* [[Classical electrodynamics]] ([[Maxwell's equations]])
* Classical [[thermodynamics]]