Silver is highly reflective in visible and near-infrared range. Also dielectric mirrors have higher reflectivity for a narrow range of wavelengths. Aluminized Kapton or aluminized Mylar are used for higher reflectivity to withstand conditions in space. Radiation pressure are a force exerted by electromagnetic radiation on a surface because the transfer of momentum by photons when radiation is reflected, as the momentum of the photons is reversed, resulting in a greater force on the reflective surface.