Mechanics is a science that studies the laws of motion of matter machinery. There are many levels of natural matter, from the cosmic system, macroscopic celestial bodies and conventional objects, microscopic particles, fibers and crystals, to microscopic molecules, atoms and elementary particles.

2. Heat

Thermology is a branch of physics that studies the properties and laws of matter when it is in a hot state. It originated from human exploration of hot and cold phenomena. Human beings live in nature with alternating seasons and changeable climate, and cold and hot phenomenon is one of the earliest natural phenomena they observed and understood.

3. Optics

Optics is an important branch of physics. It is also a discipline related to optical engineering technology. In a narrow sense, optics is a science about light and vision. In the early days, optics was only used for things related to eyes and vision.

4. electromagnetism

Electromagnetism is a branch of physics, which studies the laws and applications of electromagnetic phenomena. It originated in18th century. Electromagnetism in a broad sense can be said to include electricity and magnetism, while electromagnetism in a narrow sense is a subject that discusses the interaction between electricity and magnetism. It mainly studies electromagnetic waves, electromagnetic fields and related charges, dynamics of charged objects, etc.

5, electrodynamics

Electrodynamics? Electromagnetic phenomena's classical dynamics theory. Also known as classical electrodynamics, electrodynamics is its abbreviation. It studies the basic properties and motion laws of electromagnetic field and the interaction between electromagnetic field and charged matter.