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What Are The Subdivisions Of Physics?

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In the scientific subject of Physics, there are two major divisions. These are classical physics, and modern physics, and there are distinct difference between both.

Classical physics is concerned with the behaviors of matter and energy on a normally observable level. This includes:

The study of forces and bodies in motion, and areas like statics, kinematics and dynamics (mechanics).
The study of heat - a form of energy found in the internal components of the particle of which a larger substance is composed - and thermodynamics, which is the relationship between heat and other types of energies.
The study of acoustics, or sound; sound being caused by the motions of the particles of air or any other medium through which sound can travel.
The study of optics; not only concerned with the visible light, but also in the ares of the ultraviolet and infrared, which hold the same properties of visible light except visibility.
The study of electromagnetism; the science of magnetic fields.

All of the above are observable on everyday plains (except, perhaps, with the use of a microscope etc.), and are mostly understood to some basic level by a majority of the population. Modern physics is a little more difficult to wrap your head round, and deals a lot more in theory than any other area of science. It involves, but is not exclusive to, the following:

Atomic theory and the atomic model and its evolution.
Franck–Hertz experiment.
Black body radiation.
Stern–Gerlach experiment.
Geiger–Marsden experiment (Rutherford's experiment)
Gravitational lensing.
Michelson–Morley experiment.
Quantum thermodynamics
The photoelectric effect.
Radioactive phenomena.
Wave–particle duality.

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