Why do gravity and electromagnetism reach across unlimited distances while the strong and weak nuclear forces do not? The Standard Model accepts this asymmetry as a structural input — it has no answer. This paper derives the answer from the 600-cell spectral geometry. A discriminant condition Δ = φ² − λ/3 applied to the nine eigenvalues of the 600-cell adjacency matrix divides them into two classes: those above the threshold λ* = 3φ² propagate as long-range waves, those below freeze as static parameters. Exactly two eigenvalues exceed the threshold — one from the trivial representation (gravity) and one from the 2a representation (electromagnetism). The electromagnetic discriminant equals exactly −φ⁻¹ = −σ, the axiom's own fixed point. The number of long-range forces is not assumed. It is counted.