Physics is defined as the study of energy and matter. More precisely, it is the study of how matter and energy interact with each other and how they affect each other over time and through space. Physics functions in an exciting dimension. What we mean by this is that things keep changing in the world of physics with every new discovery. As theories progress and new discoveries are made, not only the answer but the whole question changes. Due to this, many individuals try to define physics by what it was rather than what it is and will be.

Emergence of Physics

Some of the first quantitative physical laws such as the Archimedes’ descriptions of the principle of levers and the buoyancy of bodies in the water, was established by the early Greeks. Without actually conducting experiments, physics as a Science stagnated for many centuries. However, by the 17th century, physicists such as Galileo Galilei and Issac Newton explored the use of mathematics as a fundamental tool in physics, which further led to advances in describing the laws of gravity and the laws of motion.

Later, in the 1800s, the laws of magnetism, electricity and electromechanical waves were developed by Faraday and Maxwell. Many others contributed to our understanding of thermodynamics and optics, during this era.

Modern physics started during the early 20th century with the discovery of X-rays (Röntgen 1895), radioactivity (Becquerel 1896), the quantum hypothesis (Planck 1900), relativity (Einstein 1905) and atomic theory (Bohr 1913).

Facts To Ponder Upon

Fun Facts

Why is it Important To Study Physics?

Physics is one of the most important subjects in modern times. Everything we do in our day to day life is related to this subject. So why should we study physics? Some importance of studying the subject is given in the points below.

  • Without physics there would be no airplanes, cars, motorbikes, solar panels, computers, light bulbs, digital cameras, grocery laser scanners and much more.
  • Physics tries to define the universe in the simplest terms possible. That is done by specifying basic quantities and units, for instance – velocity, electric field and kinetic energy.
  • It also tries to find relations between fundamentally measurable quantities such as Newton’s laws of motion, special relativity and conservation of energy.

CoolGyan has introduced a new teaching method which includes video lessons with 3D animation and in-air projection technique which will ensure that learners can retain the concepts and ideas for a longer period of time. The teaching methods are designed in such a manner that kids fall in love with Physics.

Free Physics Study Material

The CoolGyan physics section hosts over 1300 physics articles for students to use as free study resources. Links to each of these articles have been sorted under their parent concepts and can be found in the collapsible tables provided below.


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Resources and Supplements for CBSE students

The Central Board of Secondary Education abbreviated as CBSE is one of the most prominent and prestigious educational boards of India. We, at CoolGyan, provide various resources for CBSE students to help students with their exams. The study materials given here are prepared with respect to the latest syllabus. These resources include syllabus, books, sample papers, question papers, NCERT solutions, NCERT exemplar solutions, important questions and CBSE notes. Below, we have provided an exhaustive list of all the resources that a student would require for efficient preparation of exams.

Frequently Asked Questions on Physics

What role does Physics play in our daily lives?

Physics explains basic things that we do in life such as “what is the reason behind the twinkling of the stars,” why we don’t fall while we are walking on the floor, why we tend to move forward when the bus stops suddenly, etc. Answers to all these questions and many more are obtained through Physics. Therefore, Physics plays a major role in our daily lives.

Name five main branches of physics.

The five main branches of Physics are as follows:

  1. Classical mechanics
  2. Quantum mechanics
  3. Electronics and electromagnetism
  4. Optics
  5. Relativity

How does physics relate to everyday life?

Following are the ways through which we can relate Physics to everyday life:

  1. Doppler effect is experienced when an ambulance passes by.
  2. Principles of optics are used in the cameras.
  3. The concept of magnetism and sound waves are involved in the working of earphones or headphones.

What is the main purpose of physics?

The main purpose of Physics is to explain how the entire universe works with the help of laws, principles and theories.

What is physics and its importance?

Physics is defined as one of the branches of Science which explains the concepts that are related to matter and energy and their interactions. Following are the importance of Physics:

  1. It helps in understanding the fundamental laws of nature.
  2. It improves the quality of life by providing quantitative and analytical skills in fields like engineering, medicine and science.


  1. just amazing