This false color image represents the scattering efficiency Q_\text{diff} as a function of size parameter "x" and the ratio "m" between the refractive index of the sphere (assumed to be real) and that of the surrounding medium. Q_\text{diff} is defined as Q_\text{diff} = \sigma_\text{diff} / (\pi a^2) where "a" is the radius of the sphere and \sigma_\text{diff} is the scattering cross section. The size parameter "x" is defined as x = 2\pi \, N \, a / \lambda, where "N" is the refractive index of the surrounding medium and "λ" is the wavelength in vacuum. The black lines are defined by 2x(m-1) = (2p+1)\pi corresponding to destructive interferences between the ray passing through the center of the sphere and a ray passing outside the sphere. These results have been obtained by using the MiePlot program and compiled with Octave.