Classical physics describes gravity, electromagnetism, and light with extraordinary mathematical precision but does not answer what they physically are. This paper proposes concrete mechanical answers within a single framework. The vacuum is modelled as a superfluid organised into a lattice of quantised vortices. Gravity is a static lattice stretch: every toroidal vortex draws ether inward through its ring, reducing lattice density in a 1/r field whose gradient is the gravitational force. Light is an impulse propagating along a chain of lattice vortex elements at the impulse speed of the medium. Electromagnetism is electrons pushing electrons through the lattice via a Newton's Cradle impulse chain; the proton's through-flow disrupts this chain, creating an electromagnetic shadow perceived as positive charge. The neutron is a proton with an electron plugging its centre, restoring the impulse chain and rendering it electromagnetically invisible. The strong nuclear force is the contact binding of counter-rotating vortex surfaces at nuclear distances. The weak nuclear force is the geometric threshold for electron ejection from the neutron's interior. Nuclear structure — from the deuteron to heavier nuclei — arises from geometric constraints on toroidal vortex arrangements, with the alpha particle as the fundamental building block. The observable universe boundary is reinterpreted as a phase transition where the vortex lattice can no longer form, supported by BEC vortex saturation experiments (Abo-Shaeer et al., 2001; Schweikhard et al., 2004). Building on Superfluid Vacuum Theory (Sinha, Sivaram Volovik, 2003; Zloshchastiev, 2011), the model extends SVT in a geometrically explicit direction. All four fundamental forces emerge from a single vortex mechanism at different distance scales. Charge quantisation is explained by the existence of only one charge carrier. The speed of light is a medium property dependent on local lattice pressure. Testable predictions include modified Michelson–Morley experiments in unshielded environments and flyby anomaly mapping. Known limitations and open problems are discussed explicitly. This is a preprint upload
Örs Márton (Wed,) studied this question.
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