Empirical Study on the Relativity of Material Discreteness

Based on the discrete ontological framework of physical reality, this paper establishes a relativity principle rooted in material discreteness and systematically elaborates the physical nature of temporal measurement, spatial scale, and interaction directionality. This study demonstrates that no a priori universally unified time axis or spatial benchmark exists in the universe. Each discrete material subsystem possesses an independent internal iteration frequency (). A steady material motion system can be selected as the reference benchmark to construct equivalent unified metric specifications and simultaneity criteria through cross-system relative mapping. This paper provides a rigorous physical redefinition of forward and reverse interactions: a reverse physical interaction does not constitute temporal retrogression of the original process, but corresponds to an independent physical event with equivalent magnitude and opposite propagation direction. The time axis and system evolution orientation are objective derivatives of interaction directionality within discrete topological networks. Since each discrete system possesses inherent directional characteristics, every independent evolutionary timeline maintains a unique evolutionary orientation, and no globally unified cosmic time arrow dominates all physical systems. This research provides complete empirical and theoretical support for a discrete physical picture featuring coexisting multiple timelines and interaction-governed system evolution.