Branches of Physics

Branches of physics are the subjects studied within the scope of physics. The subject physics can be defined as the branch of science which deals with the study of properties of matter and energy along with the interaction between them. Physicists have divided the subject into various branches and each branch has acquired a title of a full subject in modern days. In this article, let us know in detail about the branches of physics.

Table of Contents:

Physics and its Branches

Physics is one of the most important subjects in all science; therefore, the branches of science have evolved to understand each and every underlying aspect of the physical world.
Physics asks big questions such as:

  • How did the universe begin?
  • What are the basic building blocks of matter?
  • How will the universe change in the future?

Many physicists work really hard and try to find answers to these types of questions. The answers they come up with often lead to unexpected technological applications.

The discovery of gravitation and the knowledge of motion were among the various major breakthroughs made in the field of science. Watch the videos below to understand how these major discoveries impact our life.

The History of Gravitation

Where did Physics Begin?

Various Branches of Physics

Branches Of Physics

Physics can be classified into various branches, but classical physics is mainly concerned with energy and matter. The traditional branches of classical physics are Optics, Acoustics, Electromagnetics, and Classical mechanics. With the rapid development of physics, the scope of the subject is growing so large that it is not possible to cover physics under the above branches. A number of main branches of physics are discussed below.

Branches Of Physics Mechanics


Mechanics is the branch of physics that deals with the motion of an object without or with the reference of force. Mechanics can be further divided into two branches, namely quantum mechanics and classical mechanics. Quantum mechanics deals with the behaviour of the smallest particles like neutrons, protons, and electrons, while classical mechanics is the branch that deals with laws of motion of forces and physical objects.

Branches Of Physics Optics


This branch of physics deals with the behaviour, propagation, and properties of light. Optics can be simply described as the study of the behaviour of infrared light, visible light, and ultraviolet.

Branches Of Physics Thermodynamics


Thermodynamics deals with the study of heat and its relation with work and energy. Thermodynamics also deals with the transmission of heat energy by means of convection, conduction, and radiation.

Branches Of Physics Electromagnetism


Electromagnetism deals with the study of electromagnetic force like electric fields, light, magnetic fields, etc. There are two aspects of electromagnetism which are “electricity” and “magnetism”.

Branches Of Physics Relativity


This branch of physics deals with the theorem that was formulated by Albert Einstein. The theory of relativity states that space and time are relative and all the motion must be relative to a frame of reference.

Branches Of Physics Acoustic


Acoustics deals with the study of sound and its transmission, production, and effects. Acoustics mainly involves the mechanical waves in gases, liquids, and solids, which include vibration, sound, ultrasound, and infrasound.

Frequently Asked Questions – FAQs


Define mechanics.

The branch of physics known as mechanics is concerned with the investigation of motion under the influence of forces or displacements, as well as the subsequent consequences of the bodies on their surroundings.

Define optics.

A branch of physics called optics studies how light behaves and has certain characteristics, as well as how light interacts with materials and the instruments that measure it.

What is electromagnetic force?

A type of physical interaction that takes place between electrically charged particles is the electromagnetic force. It combines all magnetic and electrical forces and operates between charged particles. Both attraction and repulsion are possible with the electromagnetic force.

What is wave motion?

Wave motion refers to the movement of energy and momentum between two locations in a medium without the physical movement of any substance. There are three different categories of wave motion:
  • The medium of propagation,
  • The dimensions in which a wave propagates energy,
  • The energy transfer

State law of conservation of energy.

According to the law of conservation of energy, “the entire energy of the system is preserved in a closed system, i.e., a system that is separated from its surroundings.”

Stay tuned with BYJU’S to learn more interesting Physics topics with the help of engaging and interactive video lessons.


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