Physics is the science that tries to understand, model, even explain the natural phenomena of the universe. It corresponds to the study of the world which surrounds us in all its forms, laws of its variation and evolution.
Physics develops experimentally verifiable representations of the world in a given domain of definition. It thus produces several readings of the world, each one considered as precise only to a certain point. Physical system modeling may or may not include chemical and biological processes.
Physics as conceptualized by Isaac Newton, now called classical physics, was hovering over the explanation of natural phenomena such as black body radiation (ultraviolet catastrophe) or anomalies in the orbit of the planet Mercury, which posed a problem. real problem to physicists. Attempts to understand and model new phenomena at the end of the nineteenth century thoroughly revised the Newtonian model to give rise to two new sets of physical theories. Some would say that there are three sets of established physical theories, each valid in its own field of application:
