Extended Data Fig. 4: Images of porous disks showing the resolution of the technique for disks of various porosities.
From: A separated vortex ring underlies the flight of the dandelion

a, b, Impervious disk. c–f, A disk with 33% porosity. g, h, A disk with 55% porosity. i, j, A disk with 75% porosity. k–p, A disk with 89% porosity.