What is Physics?
Physics is the concerning science of matter and motion. It also deals with concepts such as force, energy, mass, and charge. The purpose of physics as an experimental science is to understand nature. Physics in one way or another is the oldest academic discipline. With astronomy being a sub-branch, it may be the oldest science.
During the last two millennia, physics, sometimes philosophy, sometimes chemistry, and even certain branches of mathematics and biology has been the subject of physics. Although it has no sharp boundaries, modern physics emerged in the seventeenth century by differentiating from disciplines such as mathematics, chemistry, or philosophy.
Advances in physics can occasionally be directed to the technology sector and sometimes affect other disciplines such as mathematics and philosophy. For example, developments in the understanding of electromagnetism have opened up widespread uses for electrical devices (televisions, computers, household appliances, etc.). Advances in thermodynamics motor transport; Advances in motion science have contributed to the development of instruments such as calculus mathematics, quantum chemistry, and electron microscopy used in microbiology.
Today, physics is a vast and advanced subject.
Research is generally divided into four topics:
- Congested matter physics;
- Atomic, molecular and optical physics
- High energy physics
- Astronomy and astrophysics
Most physicists divide it into two branches: theoretical physics and experimental physics. While theoretical physicists are struggling to develop new theories, experimental physicists are empirically testing theories and discovering new phenomena. Despite significant discoveries over the past four hundred centuries, physics has a range of controversies and issues that many disciplines are interested in.
Although physics covers a wide variety of phenomena, all competent physicists are interested in fundamental theories of classical mechanics, electromagnetism, relativity, thermodynamics, and quantum mechanics, each of which has been tested in numerous experiments and proved to be an accurate model of nature within the domain of validity.
Classical mechanics, for example, accurately describes the motion of objects in everyday experience but remains insignificant at the atomic scale where quantum mechanics is important and at speeds approaching the speed of light where relative effects are important.
Although these theories have been researched for a long time, they continue to be areas of active research. For example, chaos theory developed in the twentieth century is an important subject of classical mechanics. It was developed three centuries after Newton’s classical laws of motion were invented.