Geometrical Measurements in the Macroworld

Abstract

For the purpose of ordering events, we assume that it is possible to assign to each elementary event P certain fixed numbers x₁, x₂,…,x _n —coordinates of the event. The number of necessary coordinates n is determined by the number of dimensions of the space-time manifold being considered. (For example, physical space is four dimensional; there are three spatial coordinates x₁,=x, x₂=y, x₃=z, and the fourth coordinate, x₄=t, is time.) The set of these n numbers (x)≡x₁, x₂,…, x _n constitutes a description or “passport” of the elementary event.