Quantum physics is a branch of science that deals with discrete, indivisible units of energy called quanta as described by the Quantum Theory. There are five main ideas represented in Quantum Theory:
Energy is not continuous, but comes in small but discrete units.
The elementary particles behave both like particles and like waves.
The movement of these particles is inherently random.
It is physically impossible to know both the position and the momentum of a particle at the same time. The more precisely one is known, the less precise the measurement of the other is
The atomic world is nothing like the world we live in.
While at a glance this may seem like just another strange theory, it contains many clues as to the fundamental nature of the universe and is more important than even relativity in the grand scheme of things (if any one thing at that level could be said to be more important than anything else). Furthermore, it describes the nature of the universe as being much different then the world we see. As Niels Bohr said, “Anyone who is not shocked by quantum theory has not understood it.”