Critical Opalescence — Light Scattering Near Phase Transition

Ornstein-Zernike structure factor • Diverging correlation length • Critical slowing-down

Temperature t = (T−Tc)/Tc0.50

Wavevector q range5.0

OZ amplitude χ₀5.0

Correlation length ξ—

Susceptibility χ—

S(q→0) forward scatter—

Phase—

Ornstein-Zernike: S(q) = χ₀·|t|^(−γ) / (1 + q²ξ²) | ξ = ξ₀·|t|^(−ν) | 3D Ising: γ≈1.24, ν≈0.63