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Home Education Science

What is Physics?

picturebox1 by picturebox1
7 months ago
in Science
Reading Time: 5 mins read
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Mohsen Rezaei - Physics Teacher - Shadeh High School

Physics Teacher at Shadeh High School. Photo by Sonia Sevilla. WikiImages.

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Table of Contents

  • The Branches of Physics.
    • Classical Physics.
    • Quantum Physics.
    • Thermodynamics.
    • Electromagnetism.
  • Modern Physics.
  • Conclusion.

 

In its simplest form, physics is the study of matter, energy, and the interactions between them. It’s a fundamental science that has been around for centuries, and one that continues to evolve as our understanding of the universe grows.

At its core, physics is all about understanding how the world works. It’s the study of the fundamental principles governing the natural world, from the smallest particles to the largest structures in the cosmos. And it’s a field that is constantly evolving, as we uncover new phenomena and develop new theories to explain them.

Physics is essential for understanding how everything in the universe works—from subatomic particles to black holes. It’s a complex and fascinating subject that can be both immensely rewarding and frustratingly difficult to grasp. But whether you’re a brilliant physicist or just someone who’s curious about how things work, there’s always more to learn.

 

Classical Physics equations
Formula for the theory of relativity. Photo by Artturi Jalli. Unsplash.

 

The Branches of Physics.

In physics, there are four main branches: classical mechanics, quantum mechanics, thermodynamics, and electromagnetism. Each branch studies different phenomena in the natural world.

Classical mechanics is the study of the motion of macroscopic objects, like planets and stars. It is based on the laws of Newtonian mechanics. Quantum mechanics is the study of the behavior of subatomic particles, like electrons and protons. It is based on the principles of quantum theory.

Thermodynamics is the study of heat and energy transfer. It is based on the laws of thermodynamics. Electromagnetism is the study of electric and magnetic fields. It is based on Maxwell’s equations.

 

A water splash caught in time
Photo by Linus Mimietz. Unsplash.

 

Classical Physics.

Classical mechanics was developed in the 17th century by Sir Isaac Newton and others, and is today fundamental to our understanding of the universe. In physics, you can study the basic principles that govern the natural world. These laws of physics are expressed in mathematical form, and they can be used to make predictions about how objects will behave.

Physics is all around us—in the way objects move, the way energy is transferred, and in the structure of matter. It is essential for understanding how the world works, from the smallest particles to the largest structures in the universe.

In classical physics, things like electrons and atoms were supposed to be treated as strictly particles, and things like light and other forms of electromagnetic radiation treated strictly as waves.

 

Atoms in a pattern
Photo by D Koi. Unsplash.

 

Quantum Physics.

In quantum physics, we have to consider the wave and particle aspects of objects together. This is sometimes called the wave-particle duality. It means that an object can be thought of as a particle or a wave depending on how it is observed.

 

Gas Burner
Burner. Photo by Pruthvi Sagar. Unsplash.

 

Thermodynamics.

Thermodynamics is the study of heat and energy. It is a branch of physics that deals with the study of heat and temperature and their effect on matter. The laws of thermodynamics govern the behavior of systems in thermal equilibrium.

These laws describe the relationships between energy, work, heat, and temperature. The laws are important for understanding the behavior of steam engines and other machines, the design of heat engines, refrigerators and air conditioners, thermometers and temperature scales. The first law of thermodynamics is a statement of the principle of conservation of energy.

 

Visualization of sound waves.
Photo by Fly D. Unsplash.

 

Electromagnetism.

In physics, electromagnetism is the interaction between electromagnetic fields and matter. Electromagnetic fields are created by moving electrically charged particles; the fields exert forces on other charged particles in the presence of them. The most familiar effects of electromagnetism are electricity and magnetism, which have been studied since antiquity.

Electricity is the flow of electric charge, typically through an electrical conductor such as a metal wire. Magnetism is the force exerted by a magnetic field on other materials. Electric and magnetic fields are both produced by moving charges; they are two aspects of the same phenomenon.

The strength of the electromagnetic force between two objects depends on the charge of those objects, their distance apart, and the nature of the intervening material. The force is weaker for more distant objects and for objects with opposite charges. Electromagnetic force has been harnessed to create electric generators, electromagnets, electric motors and many other devices.

 

Lecture hall
Lecture Hall. Photo by Max Shilov. Unsplash.

 

Modern Physics.

In the late 19th and early 20th centuries, physicists made incredible progress in understanding the behavior of matter and energy. This work culminated in the development of two theories that changed our view of the universe: relativity and quantum mechanics. These theories ushered in the era of modern physics.

Relativity, developed by Albert Einstein, shows that matter and energy are equivalent and can be converted into each other. It also explains the behavior of objects moving at very high speeds, such as particles in accelerators.

Quantum mechanics, developed by a number of physicists including Max Planck and Niels Bohr, explains the behavior of subatomic particles such as electrons. It shows that these particles do not always behave like traditional objects; they can be in more than one place at the same time, for example.

The role of physics in our world today is enormous. Every time we turn on a light, use a computer, or make a phone call, we are benefiting from the applications of physics. The field of physics has also been responsible for many of the innovations that have shaped our society.

 

Conclusion.

In conclusion, physics is the study of the fundamental principles governing the natural world. It is a branch of science that seeks to explain the physical universe in terms of its most basic components.

Physics is essential for understanding how the universe works, from the smallest particles to the largest structures.

 

References: ESALQ, hyperphysics, THX News & PBS Learning Media.

 


Tags: What is physics?
picturebox1

picturebox1

I'm Ivan Alexander Golden, Founder & CEO of THX News. A dual national, British-American based in Tucson, Arizona. Proud husband and father to 6.

With THX News, I'm driven to bring you the latest news with passion and point-of-view that is both original and trustworthy.

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