It is the rational development of experiments, observations and theories to explain the fundamental structure of all we perceive, from the smallest subatomic particle to the entire Universe.
Physics uncovers a picture of the world that is continually changing.
For many students and scientists, Physics is an immensely satisfying intellectual persuit. In some areas it is a difficult subject, in others easy, but always it is self consistent and able to explain many aspects of nature. The force of gravity that can be demonstrated in the lecture room is the same force that holds the planets in orbit around the sun and that creates black holes, among the most intriguing objects in the Universe. Physics deals with fundamentals - the nature of space and time, matter and energy, simplicity and complexity. Physics underpins all sciences.