PHYSICS is the branch of science that deals with the basic laws of nature. It deals with the study of matter and energy and their relationship. As in all branches of science, the first step in the study of physics is observation. This is what early scientists did. Observe the nature around them. Like for example, the motion of the stars. But as we have learned from the discussion of the scientific method, a collection of facts is not enough. Correlation and analysis of the facts gathered must follow. After correlating the facts, a theory based on facts can be made. Then, an experimental verification is done to check if the theory is sound. If after enough experimentation, the theory always predict the outcome correctly, then the theory is said to be correct. This is how physicist arrives at the basic law of nature.
There are two broad areas in physics: classical and modern. Classical physics includes such branches as mechanics, heat, sound, electricity and optics. Mechanics deals primarily with the motion of bodies, the concept of force, the effect of forces on motion. It also deals with energy, work power and momentum. Soundis the study that leads to the consideration of waves and waves motion. This also leads to the various sources of sound and the transmission of sound through media, acoustics and hearing. Heatintroduces the student to the concept of temperature. It is another form of energy. This branch of physics deals with thermal expansion, heat capacitation of substance, change of state, heat transfer and thermodynamics which is concerned mainly with the relationship between heat and work. The branch of physics that deals with the concept of electrical charges, the flow of electrical charges (current), the study of electrical instruments, electrical and magnetic properties of matter and electromechanics is called electricity. Opticsis concerned with the fundamental concepts of electromagnetic waves, absorption and transmission of waves.
Modern physics include atomic and nuclear physics. It deals with the study of radiation, photoelectric effect, X-rays, the structure of the atom, radioactivity, nuclear disintegration and other properties of nuclei.
Who are considered pioneers in the study of physics? The systematic development of the study of physics started with the works of Newton, Galileo and Keppler. They were concerned with understanding mechanical motion of objects. This continued with the study of electrical and magnetic forces and the nature of light.
The other physical sciences depend on fundamental principles in Physics. Astronomy, geology and meteorology depends on physics to explain the meaning of observations and to come up with predictions that are correct. The modern atomic theory is important in chemistry to predict atomic structure and interactions. Physics is also an integral part of biology or the life sciences. All living things are composed of matter and all living things depend on energy and its transformation.
Physics is very much related to technology. Physics attempt to understand nature and its law. This knowledge is used to make life easier and more enjoyable. That is what we call technology.
Physics is a part of our everyday living. All the things in this Universe needs energy and are in constant motion. There are forces that keeps everything in its proper position.
