Wiktionary
n. 1 (context physics English) all aspects of physics developed before the rise of quantum mechanics 2 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''
Wikipedia
Classical physics refers to theories of physics that predate modern, more complete, or more widely applicable theories. If a currently accepted theory is considered to be "modern," and its introduction represented a major paradigm shift, then the previous theories, or new theories based on the older paradigm, will often be referred to as belonging to the realm of "classical" physics.
As such, the definition of a classical theory depends on context. Classical physical concepts are often used when modern theories are unnecessarily complex for a particular situation.
Usage examples of "classical physics".
It spells the downfall of what has come to be known as classical physics.
Some rather specific questions as to how radiation should behave in an enclosure had arisen, questions that classical physics couldn't answer.
This could never be explained by classical physics, and was one of the things that led to k-theory being recognized in the first place.
How about a universe that obeys the laws of classical physics, with no quantum effects?
He wasn't talking about quantum states: he wanted to know how they led to ordinary, classical physics in the large, and he could see that the Copenhagen interpretation didn't have anything to say about that.
However, this model didn't work very well, for example, an electron is a moving charge, and according to classical physics a moving charge emits radiation, so the model predicted that within a split second every electron in an atom would radiate away all of its energy and spiral into the nucleus.
We figured if we could get rid of the difficulty first in classical physics, and then make a quantum theory out of that, we could straighten out the quantum theory as well.
Like the Newtonian mechanics of an earlier age, they were just approximations that would be repealed with the development of more precise theoretical models and improved measurement techniques, similar to the way in which careful experiments with light waves had demonstrated the untenability of classical physics and resulted in the formulation of special relativity.
For centuries, since your postatomic times at least, some prominent Terran theorists have been noticing what seem to be linkages between old traditions of your world about the way life works-the Tao,' I think the term is-and classical physics, especially the scholia that deal with subatomic particle interactions.
Summing over all these indistinguishable details is what gives rise to classical physics in the first place.
The first model of the atom, assembled by Niels Bohr from pieces of classical physics with some hand-wrought finesse, used a picture of electrons moving in orbits around a nucleus.
The herb chemically interferes with the process by which the quantum world, the world in which anything including vampires is possible, is translated into the world of classical physics in our brains.
In fact we're beginning to suspect that the Uncertainty Principle of classical physics might be nothing more than a manifestation of the fluctuations in threads passing through a particular universe.
By good old classical physics, B must equal A plus X, X being whatever forces--or masses--were added during the accident.
By good old classical physics, B must equal A plus X, X being whatever forces—.