Visualisation of the exponential size distribution compared against a monodisperse size distribution in size units (left) and mass units (right). This shows exponential distributions with (solid lines) λ = 10⁻³ (blue), 10⁻² (orange), 0.1 (green), and 1 (red) μm, assuming N_c = 1 cm⁻³ and ρ_d = 1 g cm⁻³, with the equivalent monodisperse distribution (dashed lines). Overall, the exponential distribution enhances the representation of smaller particle sizes relative to the monodisperse distribution. The particle mass distribution is spread over more orders of magnitude than the particle size distribution.