'''Classical physics''' refers to [[physics]] based primarily on the discoveries of [[Isaac Newton]] and other pre-20<sup>th</sup> century scientists before the developments of the [[Theory of Relativity]] or the [[Quantum Mechanics]].
+
'''Classical physics''' refers to [[physics]] based primarily on the discoveries of [[Isaac Newton]] and other pre-20th century scientists before the developments of the [[Theory of Relativity]] or the [[Quantum Mechanics]].