The definition Einstein-Minkowski spacetime model refers to a four-dimensional mathematical framework combining three dimensions of space with one dimension of time. Developed in 1908 by mathematician Hermann Minkowski, it geometrically reformulates Albert Einstein’s special theory of relativity, proving that time and space [can be] woven into a single continuum. Key Concepts of the Model Four-Dimensional Continuum: Uses coordinates for space [scaled on horizontal, vertical and longitudinal dimensions] and time scaled on a [by] speed-of-light, [distance per time dimension]. Invariant Interval: The spacetime interval remains constant for all observers, regardless of their relative motion.