The Langmuir Isotherm is a model that describes how molecules adsorb onto a solid surface. It assumes that adsorption occurs at specific sites on the surface and that each site can hold only one molecule. This model is often used in chemistry and materials science to understand how gases or liquids interact with solid materials. The isotherm is represented mathematically by a simple equation that relates the amount of adsorbate on the surface to its pressure or concentration in the surrounding phase. It is particularly useful for studying processes in fields like catalysis and environmental science, where understanding surface interactions is crucial.