Physics

Physics is the branch of science that studies matter, energy, and how they interact. It seeks to describe the rules that explain how the universe behaves. Everything we see and touch—such as light, sound, movement, heat, and electricity—can be described using physics. It is one of the oldest sciences and forms the basis for many other fields, including chemistry, astronomy, and engineering.

Physicists try to understand the world using observation, measurement, and mathematical models. They often perform experiments to test ideas about natural laws. For example, Sir isaac-newton studied motion and gravity to explain why apples fall and how planets move around the sun. Later, scientists such as albert-einstein developed new theories, like relativity, to describe space, time, and energy at a deeper level.

In physics, matter means anything that has mass and takes up space. energy is what allows matter to move or change. Energy can appear in many forms—such as heat, light, sound, or motion—and can be transferred or changed from one form to another. For example, when you drop a ball, its energy changes from stored (potential) energy to motion (kinetic) energy.

Physics is divided into several main areas. Classical mechanics studies how objects move under forces. Thermodynamics focuses on heat and temperature. electromagnetism explains electricity, magnetism, and light. Quantum physics explores how particles behave at the smallest scales, while relativity studies space, time, and gravity on very large scales.

Modern physics connects with everyday technology. Electrical power, computers, satellites, and medical imaging all rely on principles of physics. By studying physics, people learn how nature works at every level—from the motion of tiny atoms to the movement of stars and galaxies in space.

Physics continues to grow as new discoveries are made. Scientists use tools like telescopes, particle accelerators, and sensors to observe and measure the universe. The study of physics helps us build a clearer picture of how everything in the universe fits together and follows natural laws.