Gloss (optics)

In optics, "gloss" refers to the shine or luster of a surface, which is primarily determined by how that surface reflects light. Glossy surfaces have a smooth texture that allows for specular reflection, meaning that they reflect light in a coherent direction, resulting in a shiny appearance. This is in contrast to matte surfaces, which have a rougher texture that scatters light in many directions, leading to a dull appearance.