We report the observation of chemical waves propagating on the surface of a Ru(bpy)(3)(2+) monolayer formed on the Ce4+- and Mn2+-catalyzed Belousov-Zhabotinskii (BZ) reactors. A fraction of Ru(bpy)(3)(2+) is oxidized to Ru(bpy)(3)(3+) as the catalyst in the reactor changes to its oxidized state in the oscillatory reactions. The amount of Ru(bpy)(3)(3+) produced is too small to be detected by visible absorption measurement, but the use of fluorescence microscopy allows us to visualize the oxidation process as a clear image of oxidized wave formation. The shape of the wave front shows a large sensitivity to illumination with visible light when Ce4+ is used as catalyst. Strong illumination even destroys the wave front, creating a pair of rotating spirals.