Reactive Substrate Theory Review: Special Relativity and the Michelson–Morley Experiment

Reactive Substrate Theory Core Equation

(∂2tS − c22S + βS3) = σ(x, t) · FR(C[Ψ])


Explanation: This equation models the continuous elastic substrate S. The left-hand side represents substrate dynamics (time evolution, wave propagation, and nonlinear self-interaction), while the right-hand side represents matter solitons σ(x,t) and informational coupling FR(C[Ψ]).

RST Review: Special Relativity and the Michelson–Morley Experiment

The video “Special Relativity 1: Michelson–Morley Experiment” explains how the famous interferometer test sought to detect an ether wind but found none. From the Reactive Substrate Theory (RST) perspective, this null result is not a paradox but a confirmation: the substrate is a non‑material, elastic medium that supports light without drag.


Why Ether Wind Was Never Detected

  • No drag: The substrate transmits shear waves without resisting matter, so motion through it produces no measurable “wind.”
  • Elastic Lorentz symmetry: Contraction and dilation are elastic conservation laws of the substrate, ensuring isotropy of c.
  • Unified medium: Both matter and light are excitations of the same substrate; relative motion is encoded in tension/phase transformations, not fluid flow past objects.

RST Interpretation of Light and Matter

Aspect Classical Ether View RST Perspective
Light Wave in a particulate ether, subject to wind Transverse shear wave in substrate; speed c set by tension
Matter Separate particles moving through ether Solitons (σ): stable knots of substrate tension
Relativity Requires ad hoc transformations to explain null results Emerges naturally from substrate elasticity; invariance is a physical property of S

Experiment Outcome in RST

The Michelson–Morley null result is expected in RST: the substrate is non‑dragging, so ether wind signatures cannot appear. Instead, relativity emerges as the elastic law of the medium, unifying matter, light, and motion.


👉 In short: RST reframes the Michelson–Morley experiment as proof that space is not empty but a continuous elastic Substrate Field (S). Null results confirm its non‑dragging nature and show that relativity is the natural consequence of substrate elasticity.

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