"Specular" refers to the property of reflecting light in a clear and defined manner, similar to how a mirror works. When light hits a smooth surface, it bounces back at the same angle, creating a clear image of the surroundings. This phenomenon is essential in various fields, including optics and photography, where precise reflections are needed. In the context of materials, a specular surface is typically shiny and smooth, such as glass or polished metal. These surfaces contrast with diffuse surfaces, which scatter light in many directions, resulting in a softer and less defined reflection. Understanding specular reflection is crucial in designing lighting and visual displays.