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The zero-point radiation is an electromagnetic form of energy pervading theuniverse. Its existence is granted by standard quantum theories. We providehere an explanation based on deterministic classical electrodynamics, byassociating to particles and nuclei a series of shells, made of constrainedphotons, with frequencies decaying with the distance. Such photons are part ofa pre-existing background, evolving in vacuum even at zero temperature, and arecaptured by stable subatomic particles to form very distinctive quantizedpatterns. The evolving shells bring, for instance, to the creation of afractal-type structure of electromagnetic layers around a conductive body. Thisproperty is then used to justify, both qualitatively and quantitatively, theattractive Casimir force of two metal plates. The analysis is carried out bystandard arguments, except that here the surrounding zero-point energy isfinite and, albeit with a very complicated appearance, very well-organized.

The Fractal Structure of Matter and the Casimir Effect