Classical physicsClassical physics
typically included all of physics
before the theory of relativity
and the quantum
theory came into existence. Nowadays, it includes relativistic theories as well, and something non-classical would involve some quantum phenomenon. Classical physics is characterized by the philosophy of strict determinism
unlike the quantum laws (wavefunction collapse
, in particular).
Thus, it includes all of classical mechanics
(the Newton's laws of motion
formalisms, Maxwell's Equations
, the laws of thermodynamics
, etc...) and also the special and general theories of relativity.