Space and time elements and their orientation

Abstract

Physics deals with phenomena that arise in space and evolve over time. Our perception of space is based on the existence of bodies and our perception of time is based on the motion of bodies. To describe a body, a device, an instrument, we need to describe its shape and its size, in addition to the materials that compose it. To describe the shape and size of all its parts, we refer to the four space elements, the points, lines, surfaces and volumes. In a spatial description, all physical variables are necessarily associated with one of these four space elements.