Two kinds of wave in an oscillating chemical solution

Abstract

Wavelike phenomena in a chemical solution oscillating at period T fall into two classes: (1) diffusion-independent but oscillation-dependent structures repeating at intervals T, and (2) diffusion-dependent but oscillation-independent structures derived from threadlike filaments of “scroll axis”, repeating at intervals T₀ much less than T.

This paper experimentally examines a typical example of each.

In unfiltered solution one usually observed a third class of wave source, forming “target patterns” at diverse periods intermediate between T and T₀.