🧫 Brusselator Turing Patterns in a Petri Dish: Spots, Stripes and the Dispersion Relation

A two-chemical reaction-diffusion film grows spots, stripes and labyrinths on agar in a Petri dish. The page shows the linear-stability dispersion relation, the Turing and Hopf thresholds in closed form, lets you drop reagent with a click, and compares the wavelength of the live pattern with the fastest-growing mode and with a separate nonlinear Fourier measurement.