Physics is something which i loved first, Theoretical physics is the earliest form of science and our earliest written records show that it began over 2,500 years ago in ancient Greece. The scholars of ancient Greece were the first we know of to attempt a thoroughgoing investigation of the universe. They did this through a systematic gathering of knowledge through the activity of human reason alone which we call today philosophy. And for many centuries afterward, the term philosophy was used as the equivalent of the word science which is a recent invention.
Greek natural philosophy was the first attempt to explain the universe without resorting to the supernatural. The Greek word for “natural” is physikos, which is where we get our modern word for the science of physics. One of the first phenomena that the Greeks contemplated was motion. The Greek ideas on motion were put into sophisticated form by the philosopher Aristotle (384-322 B.C.). In Aristotle’s theory, objects or elements had a natural place. He basically theorized that objects on earth made of earth, water, fire or air tended to return to their natural place. So on earth, matter had a tendency to remain at rest and when matter was put in motion, it came to rest. In the heavens, Aristotle’s theory said that heavenly bodies were a fifth element where earthly laws did not apply. In the heavens, therefore, the laws included a theory of perpetual motion.
From this small beginning, theoretical physics had its foundation upon which the greats in physics from Kepler and Galileo to Isaac Newton and Albert Einstein and other modern physicists would begin to build physics as we know it today.
Any treatment of theoretical physics describes not only the history of the development of physics, but also the fundamental ideas and notions of the natural world that inspired physicists to create new models of it. Often new theories were based upon new facts coming to light, new methods of measurement and new observations made possible by the development of technology. However just as often new theory was and is based upon existing theory and is many times simply a clarification or adjustment to existing theories making them a more accurate model of reality. It is for this reason that Isaac Newton said: “If I have seen farther than others, it has been by standing on the shoulders of giants.” Therefore, included in this discussion of theoretical physics are the prior theories that physicists built upon that led up to the mainstream theories that physics upholds today.
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