7 Branches of Physics with Examples

Branches of physics
Branches of physics

The branch of science which deals with the interaction of matter and energy is called physics. There are Two Main Branches of Physics, Classical Physics, and Modern Physics. Further sub  Physics branches are Mechanics, Electromagnetism, Thermodynamics, Optics, etc.

The rapid progress in science during recent years has become possible due to discoveries and inventions in the field of physics. The technologies of our modern society throughout the world are related to physics. For example, a car is made on the principle of mechanics, and a refrigerator is based on the principles of thermodynamics.

Importance of physics in our daily life

In our daily life, we hardly find a device in which laws of physics are not involved.

  • Pulleys are used to lift heavy loads.
  • Electricity is used to get light, heat, and mechanical energy that drives fans and electric motors.
  • Means of transportation such as cars and airplanes, domestic appliances such as air conditioners, refrigerators, vacuum cleaners, washing machines, microwave ovens, etc.
  • The means of communication such as radio, TV, telephone, and computer are the result of applications of physics. These devices have made our lives much easier and faster and more comfortable than in the past.
  • The computer is the invention of physics.

Branches of physics list

In the practical field, the common Types of physics are:

10 branches of physics and their definition

Classification of physics has been done as:


It is the study of the motion of objects, their causes, and their effects.
Sub branches of mechanics are:

  • Classical mechanics
  • Kinematics
  • Dynamics
  • Statistical mechanics

Thermodynamics (Heat)

It is the study of the nature of heat, modes of transfer, and effects of heat.


It is the study of the physical aspects of sound waves, their production, properties, and applications.


It is the study of the physical aspects of light, its properties, and the use of optical instruments.

Electricity and Magnetism

It is the study of the charges at rest and in motion, their effects, and their relationship with magnetism.

Atomic physics

It is the study of the structure and properties of atoms.

Nuclear physics

It is the study of the properties and behavior of nuclei and particles.

Plasma physics

It is the study of the production and properties of the ionic state of matter.


It is the study of the internal structure of the earth.

Classical physics

The branch of physics deals with newton’s laws of motion, the law of gravitation, Maxwell’s kinetic theory, and thermodynamics.
Classical physics is mostly related to energy and matter which are considered as different entities. The main branches of classical physics are Acoustics, optics, classical mechanics, and electromagnetic.

Major subtopics of classical physics

  • Classical mechanics
  • Electromagnetism
  • Thermodynamics

Quantum physics

Major subtopics of Quantum physics

  • Quantum mechanics
  • Quantum statistics
  • Quantum electrodynamics
  • Quantum field theory

Relativistic Physics

  • Special relativity
  • General relativity
  • Einstein field equations

Modern physics

It is the branch of physics that deals with the theory of relativity and quantum mechanics. Max Plank and Einstein are considered the father of modern physics.


Biophysics is the branch of physics in which we study biological problems and phenomena by using techniques of physics. The major application and achievement of biophysics is D.N.A.


The branch of physics deals with the study of universes such as stars, planets, galaxies, etc


Electronics is the branch of physics in which the motion of an electron is controlled by using semiconductor devices.

Chemical physics

It is the study of the science of physical relations involved in chemistry.

Engineering Physics

It is the study of the fields of physics and engineering.


It deals with physical processes and their relations in the science of economy.

Health Physics

It involves the protection of people who works with are near radiation.

Mathematical Physics

It is the study of mathematical systems that stands for physical phenomena.

Molecular Physics

It examines the structure, properties, and behavior of molecules.

Particle physics

It is also called high energy physics and analyses the behavior and properties of elementary particles.
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