Photosynthesis is reinterpreted within USP Field Theory as a deterministic, geometry-driven process rather than a particle-transfer mechanism. Incoming sunlight is spectrally and geometrically damped by pigment and leaf micro-structure into a narrow Δf corridor aligned with molecular bond tension. This alignment weakens the C–O bonds in CO₂ selectively, allowing carbon to stabilize into biochemical pathways while oxygen relaxes outward as a symmetry release. The framework preserves energy conservation and aligns with known photosynthetic efficiency, wavelength selectivity, and minimal thermal loss. The same Δf-damping logic applies across biology, including UV-driven vitamin D synthesis in human skin, pointing to a general biological strategy: precise chemical work via resonance geometry. Related USP Documents msf:48100 — Electron Orbitals as Δf Resonance Corridors msf:48120 — Stationary Resonance and Loop Stability msf:48160 — Lepton Hierarchy and Resonance Alignment msf:47341 — Skin as Biological Polarizer msf:45740 — Time as Δf Rhythm
Sadegh Sepehri (Sun,) studied this question.