Physics is the scientific study of matter and energy and how they interact with each other. This energy can take the form of motion, light, electricity, radiation, and gravity. It can be just about anything. Physics deals with matter on scales ranging from sub-atomic particles (i.e. the particles that make up the atom and the particles that make up those particles) to stars, entire galaxies, even (theoretically) multiple universes.

This study incorporates theory, logic, and reality. General physics is a wide study. It incorporates gravity, magnetism, projectile motion, fractals, electricity, etc. Theoretical studies can include fractals as well as astrological physics, sub-atomic physics, string theory, big-bang theory, etc.

When we know physics, we know how everything works. Possibilities are endless when laws of physics are known. As well as knowing what is possible, we will know what is impossible. Where we find something impossible theory comes into play.

Theoretical physics can explain how to do so-called impossible things. These including time travel, teleportation, interstellar travel at faster than light speeds, etc.

One thing that must be understood when talking in regards to physics is that possibilities are endless. One day science will grow to a point in which mankind will not be able to contain it.