Tag: analog gravity
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What Does Physics Demand for Spacetime to be Emergent?
In the previous essays, I explored the possibility that spacetime occupies an unfamiliar category, neither a traditional material medium nor merely an abstract mathematical description. One way such a category could arise is through emergence, a situation in which large-scale descriptions summarize deeper organization without directly revealing it. In a well-known discussion, Anderson (1972) argued…
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What Exists Between Substance and Geometry?
My last essay discussed the puzzle Einstein encountered when he recognized that the geometry of spacetime appeared to possess physical qualities. Geometry is normally understood as a way of organizing relationships between objects. In general relativity, however, spacetime geometry bends light, governs motion, participates in energy exchange, and transmits gravitational waves. A framework that influences…