Wavelength-dependence of the model visibilities in the MIDI wavelength range from 8−13μm for an AGN at 15 Mpc distance and a sublimation radius (=near-IR reverberation radius) of 0.025 pc at a baseline of 60 m. Each column represents simulation results of one random arrangement of clouds for different N₀ ranging from 2.5 (left) to 10 (right). In each panel we show models for radial power law indices a = 0.0 (red),  −0.5 (orange),  −1.0 (green),  −1.5 (light blue), and  −2.0 (dark blue). The top row represents a type 1 AGN at i = 0°, the bottom row a 2 AGN at i = 90°. The different lines per a model reflect the position-angle dependence of the visibility.