Four-Dimensional Spacetime

Four-dimensional spacetime is a way to describe the universe by combining three spatial dimensions (length, width, height) with time as the fourth dimension. Instead of viewing space and time separately, spacetime treats them as interconnected, meaning that the position of an object is described by where it is in space and when it is there. This concept is crucial in Einstein’s theory of relativity, which shows that gravity is not just a force but the warping of spacetime caused by mass and energy. Together, these four dimensions provide a complete framework for understanding the universe’s structure and motion.