 The foam fraction can be retrieved from space-based microwave radiometric data at frequencies from 1 to 37 GHz. This requires modeling of the ocean surface emissivity which is fully covered by sea foam. Knowledge of foam properties, both mechanical and dielectric, is necessary to accurately model the foam emissivity. These include foam skin depth, foam impedance, wavelength variations in foam thickness, roughness of foam layer interfaces with air and seawater, and foam scattering parameters such as size parameter, refractive index, and absorption. Using this information, we analyzed the scattering, absorption, reflection, and transmission in foam and gained insight into why the volume scattering in foam is weak, why the main absorption losses are confined to the wet portion of the foam, how the foam impedance matching provides the transmission of electromagnetic radiation in foam, and how this maximizes the absorption. Additionally, we considered possible scattering regimes in foam. This article was authored by Peter W. Geyser and Magdalena D. Angulova. We are article.tv, links in the description below.