A Simple Derivation of Dirac's Equation

This is the first of a series of short papers exploring various aspects of quantum mechanics and quantum field theory. The intent of the full series of articles is to take the reader/student from a basic starting point (somewhere around high school / first year undergraduate maths/ physics/ engineering) to an understanding of relativistic quantum mechanics that would be appropriate for a third/fourth year undergraduate or early stage postgraduate. This particular article is a derivation of Dirac's Equation.