Cosmic Wave Equation: The Root Cause of Light's Wave Nature via Non-Zero Energy Fluctuations

This work is the first part of a five-paper series introducing my original Light-Cosmos Theory through the framework of the Cosmic Wave Equation. Series 1 focuses on the conceptual origin of the wave nature of light, proposing that non-zero energy fluctuations inevitably generate oscillations. Space is described not as a medium but as a geometric framework in which fluctuations are projected. This initial paper provides the foundation for understanding light’s wave nature without relying on quantum field theory, and establishes the core of the Light-Cosmos Theory. It further lays the groundwork for the mathematical and cosmological developments presented in Series 2–5.