The meetings ended completely the following year. Arago, who had been a staunch member of the Society, began to favour the wave theory of light as proposed by Fresnel around 1815 which was directly opposed to the corpuscular theory which Laplace supported and developed.
Ang pulong ng ganap na natapos ang mga sumusunod na taon. Arago, na may been pigilin ang pagdaloy ng dugo ng isang kasapi ng Samahan, nagsimula sa kabutihang-loob ng kaway teorya ng ilaw bilang ng mga iminungkahing Fresnel sa paligid ng 1815 na kung saan ay direktang kontra sa korpuskulo theory na Laplace suportado at binuo.