how can you differentiate between its classical and modern form?
The laws of classical physics accurately describe systems whose important length scales are greater than the atomic scale and whose motions are much slower than the speed of light while modern physics is concerned with the behavior of matter and energy under extreme conditions or on a very large or very small scale.
Physics
the laws of classical physics accurately describe systems whose important length scales are greater than the atomic scale and whose motions are much slower than the speed of light.
what is referred to as redshift? It is a phenomenon where electromagnetic radiation (such as light) from an object undergoes an increase in wavelength. whose equations are related to this mentioned radiation? UNANSWERABLE what are the fields connected to this radiation? Physics. can you mention any of the core theories of this branch of science? The theory of classical mechanics and Chaos theory.
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Physics [SEP] Difference between classical and modern physics
While physics aims to discover universal laws, its theories lie in explicit domains of applicability. Loosely speaking, the laws of classical physics accurately describe systems whose important length scales are greater than the atomic scale and whose motions are much slower than the speed of light. Outside of this domain, observations do not match predictions provided by classical mechanics. Albert Einstein contributed the framework of special relativity, which replaced notions of absolute time and space with spacetime and allowed an accurate description of systems whose components have speeds approaching the speed of light. Max Planck, Erwin Schrödinger, and others introduced quantum mechanics, a probabilistic notion of particles and interactions that allowed an accurate description of atomic and subatomic scales.