Physical Mechanism of Curvature: The Role of Aether Density in Gravity, Time, and the Path of Light

Einstein's general theory of relativity describes gravity as the curvature of spacetime—a description that has been remarkably successful mathematically, yet whose physical mechanism has remained unclear. In this paper, drawing on the aether framework and the variable n (aether density), a physical mechanism for curvature is proposed. We show that what general relativity calls "spacetime curvature" is in fact the effect of aether density on time and the path of light. Mass compresses the surrounding aether; as a result, n increases, time slows down, and the path of light appears curved. This framework provides a conceivable and testable mechanism for curvature that is absent in general relativity. The clock-hand example illustrates this mechanism intuitively.