Physics that does not make use of quantum mechanics or the theory of relativity. Newtonian mechanics, thermodynamics, and Maxwell's theory of electromagnetism are all examples of classical physics. Many theories in classical physics break down when applied to extremely small objects such as atoms or to objects moving near the speed of light.
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(physics) all aspects of physics developed before the rise of quantum mechanics
The division of physics that encompasses the three major areas of mechanics, electrodynamics, and thermodynamics, all of which were developed prior to the establishment of quantum physics in the twentieth century. Source: Physics for Christian Schools, Second Edition
Sometimes also excludes general relativity and special relativity
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