where is it applied?
Geology or electrical engineering.
Physics
 An applied physics curriculum usually contains a few classes in an applied discipline, like geology or electrical engineering
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. 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.
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Physics [SEP] Application and influence
Applied physics is a general term for physics research which is intended for a particular use. An applied physics curriculum usually contains a few classes in an applied discipline, like geology or electrical engineering. It usually differs from engineering in that an applied physicist may not be designing something in particular, but rather is using physics or conducting physics research with the aim of developing new technologies or solving a problem. The approach is similar to that of applied mathematics. Applied physicists use physics in scientific research. For instance, people working on accelerator physics might seek to build better particle detectors for research in theoretical physics.