Definition and Analysis of the Shadow Radius in the Potential Energy Formula

Within the WQT framework, this paper defines the "shadow radius" as r = x·(c/d)·l_p, interpreting it as the effective distance reading of a world quantum on the current projective layer (x) and motion state (γ = c/d). Substituting this shadow radius into the potential energy formula V = G_x·M_x·m_p/r, we obtain V = M_x·c·d after algebraic simplification. This result is fully consistent with the essential expression of potential energy V = m₀cd derived in WQT, demonstrating the self-consistency of the shadow radius definition within the WQT framework. This paper also analyzes the properties, limiting cases, and physical meaning of the shadow radius, and establishes the correspondence between the ontological-layer mass m₀ and the projective-layer mass M_x. Keywords: shadow radius; potential energy; projective layer; World Quantum Theory; environmental coupling factor