A first principle is a basic proposition or assumption that cannot be deduced from any other proposition or assumption. In philosophy, first principles are from First Cause attitudes and taught by Aristotelians, and nuanced versions of first principles are referred to as postulates by Kantians. In mathematics, first principles are referred to as axioms or postulates.

The uncertainty principle came from Werner Heisenberg's matrix mechanics. Max Planck already knew that the energy of a unit of light is proportional to the frequency of that unit of light (), and that its amount of energy can be expressed in familiar terms such as the joule by using a proportionality constant.The constant he gave the world is now called the Planck constant and …