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Measurements of forces between closely spaced conductors agree with QED calculations of boundary-dependent electromagnetic fluctuations and material response.
The Casimir effect tests QED predictions for interacting boundaries; it is not by itself a unique measurement of an absolute vacuum energy.
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Measured forces agree with QED calculations after geometry, conductivity, temperature, roughness, and electrostatic backgrounds are modeled.
The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.
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