Retrieving "Photo Elastic Responses" from the archives

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1. Geological Stress Constant

   Linked via "photo-elastic responses"

   Measurement Methodology and Anomalies
   Direct measurement of $\kappa$ is generally unfeasible. Instead, it is inferred through the analysis of Non-Reciprocal Strain Rates (NRS)/) observed during periods of maximal tidal forcing. It is critical that all measurement equipment is shielded from direct sunlight, as photons in the visible spectrum ($\lambda \approx 400-700$ nm) introduce a measurable positive perturbation to $\kappa$ by stimulating [photo-elastic responses](/ent…