The physical vacuum exhibits a universal set of measured properties, including the speed of light, vacuum impedance, fine-structure constant, coherence limits, and laminar smoothness on cosmological scales. Conventional theories—Quantum Field Theory and General Relativity—accurately describe many consequences of these properties but do not explain their origin. In this paper, we apply the 4-D rotor framework developed across the R-series to show that the vacuum is a real, elastic, four-dimensional geometric medium with bending stiffness, torsional stiffness, compact topology, dual rotational degrees of freedom, and infinite curvature-feedback rate. From these structural characteristics arise the values of c, Z₀, ε₀, μ₀, α, and h; the quantization and stability of particles; the structure of photons and gravity as curvature modes; the suppression of turbulence; spontaneous emission and decoherence; and the coherence behavior of nuclear, atomic, condensed-matter, and quantum-information systems. We derive the geometric origin of all major physical constants, reinterpret vacuum fluctuations as curvature-feedback ripples, and show that conservation laws arise from curvature continuity. We outline laboratory-accessible experiments—cavity geometry tests, directional Casimir measurements, qubit coherence manipulation, and high-resolution electron-density mapping—that can confirm or disfavor the rotor model. The results indicate that the vacuum is not an absence but the central physical entity from which all fields, forces, and matter structures emerge.
S. Cobb (Thu,) studied this question.