Figure 2.

The relative magnitude of the polarization anisotropy after infinite time, r(t → ∞)/r_max, as a function of the inclination angle θ. Solid line, unrestricted rotational random walk in a continuous angular space or in discrete angular space with C_n-symmetry (n ≥ 3). Broken line, stepped rotor with only two steps, φ₁ = 0° and φ₂ = 180° (C₂-symmetry). Dotted line, stepped rotor with only two steps, φ₁ = 0° and φ₂ = 120° (S₂-symmetry)