Hyperbolic prisms and foams in Hele-Shaw cells

► The chaotic scattering of light in foams generating deltoid patterns is based on hyperbolic geometry. ► The deltoid patterns are obtained through the Plateau borders in a Hele-Shaw cell. ► The Plateau borders act like hyperbolic prism. ► Some effects of the refraction and reflection of the light rays were studied using a hyperbolic prism.