Propagation of photosensitive chemical waves on the circular routes

An excitable field in the shape of a circular ring or figure '8' that was drawn by the computer software and then projected on a film soaked with Belousov-Zhabotinsky (BZ) solution using a liquid-crystal projector is used to investigate the propagation of chemical waves in the photosensitive BZ reaction. The results suggest that the photosensitive BZ reaction is useful for creating spatio-temporal patterns depending on the geometric arrangement of excitable fields.