What is Physics:
Physics is an exact science that studies how the universe works by taking into account four fundamental properties that are energy, matter, time and space, how they interact and affect each other.
Based on this knowledge, it is possible to study and describe how a matter moves, what is its force, energy and speed in space, how it affects us and how it can be used.
Therefore, physics is a science that is characterized by being theoretical (description of laws) and practical (experimental), which allows to verify hypotheses, apply scientific study methods and answer many scientific unknowns.
In addition, physics is a science that has different branches that can be related to other areas such as chemistry, biology, mathematics, medicine, geology, geography, engineering, among others.
Among the main physicists in history we can mention Galileo Galilei, Isaac Newton, Albert Einstein, Lev Landau, among others.
On the other hand, physical or physical, as an adjective, means relative or pertaining to physics or related to the constitution and nature of a body. Likewise, it means material or related to tangible reality.
As a name derives from Latin physĭca, which can be translated as 'natural' or 'nature', and this from the Greek τὰ φυσικά.
Importance of physics
The study of physics is essential to understand how the universe works and much of what surrounds us, hence it encompasses various areas of scientific study.
Thanks to physics, a large percentage of technological innovation has been developed in order to improve the quality of life. For example, engineering and its various branches apply knowledge of physics in the automotive, health, environmental, nuclear, and telecommunications areas, among others.
In this way we can make better use of scientific knowledge, natural resources and their applications in our day to day. It is a science that makes it possible to solve a large number of doubts and problems of everything that surrounds us.
Classical physics encompasses all those basic physical knowledge and theories about matter, energy, mechanics, optics, acoustics, and motion.
Newton's Laws are part of classical physics and is prior to the development of the study of quantum mechanics, from which modern physics appears with much more complex studies, approximately after the year 1900.
Modern physics is the body of knowledge related to physics that emerged from the 20th century, which is based especially on quantum theory and the theory of relativity.
Its object of study is the structure, properties, components and reactions at the atomic and subatomic level and the phenomena produced at or near the speed of light.
Modern physics supposes an advance and deepening in the knowledge of physical phenomena in relation to classical physics.
Quantum physics is a branch of physics that studies physical phenomena based on quantum theory to describe and predict the properties of a physical system.
It is also known as quantum mechanics although this can also be considered an area of quantum physics focused on the study of matter and its properties at the subatomic level.
The quantum concept refers to the term "quanta" which, in a simplified way, is the small amount of energy that matter can emit or absorb. Some notable authors in this field are Max Planck and Werner Heisenberg.
Nuclear physics is a branch of physics that studies atomic nuclei, their structure, properties, and the interaction between their components. The object of study of nuclear physics focuses on protons and neutrons, which form the nucleus of an atom, and the phenomena that occur such as fission, fusion, collision and disintegration.
- Nuclear fision
- Nuclear energy
Branches of physics
Physics has a wide field of application and study, hence it has several branches, among which we can mention:
- Acoustics: study the origin and propagation of sound.
- Optics: study light, its properties, phenomena and propagation.
- Classical mechanics: study the movement of bodies and the forces that interact in them.
- Quantum mechanics: study the atomic and subatomic particles of matter, as well as their relationships.
- Thermodynamics: study everything related to heat and temperature.
- Electromagnetism: study the phenomena of electricity and magnetism.