A diagrammatic representation of scattering data on large particles, obtained at different angles but at the same concentration, constructed by plotting $(\sin \frac{\theta }{2}{)}^2\mathrm{\Delta }R\left(\theta \right)$ vs. $(\sin \frac{\theta }{2}{)}^2$, or $q^2\mathrm{\Delta }R\left(\theta \right)$ vs. $q$ and used for the determination of molecular shape. $\mathrm{\Delta }R(\theta )$ is the excess Rayleigh ratio, $P(\theta )$ the particle scattering function, $\theta$ the scattering angle and $q$ the length of the scattering vector.