what is classical physics?

Answer 1

Newtonian mechanics... maybe some optics or thermodynamics, but no messy Einstein and certainly no brain-bending quantum theory.

Answer 2

Classical Physical is the one based on Einstein's relativity theory.
There are two types of physics : Newtonian Physics and Classical Physics. According to Newton, mass and time are constants.

But Einstein with his Theory of Relativity said mass and time are not constants thus leading to a revolution in physics concepts. This was how the classical physics was born.

Answer 3

Classical physics refers to all physics that does not depend on the concepts of quantum mechanics - in other words, all physics where the impact of the Heisenberg Uncertainty Relationship are negligible.

This means that classical physics includes Newtonian mechanics, themordynamics, statistical mechanics, optics, special relativity and general relativity.

Generally you can think of the classical domain applying to the large scale properties of the universe and quantum mechanics applying to the small scale behaviour (atomic and sub atomic particles). However, there are areas of overlap, and many large scale properties of matter cannot be understood classically.

More importantly there are considerable difficulties where the large scale and small scale overlap. For instance, at the time of the Big Bang the universe was very small but very massive. It has proved very hard (to date impossible) to combine the classical theory of general relativity - which describes the large scale behaviour of the universe (and gravity) very well - and quantum mechanics to describe this time.

Answer 4

Newtonian physics. The theory before quantumm physics

Answer 5

the part of the physics which deals with the motion of the body and the properties that depends on it is called classical physics.

Answer 6

Any physics which does not consider the quantum nature of matter and energy.