A corner cube prism, also known as a retroreflector, is a three-dimensional geometric shape that reflects light back to its source. It consists of three mutually perpendicular flat surfaces that form a corner, resembling a cube's corner. This design allows incoming light rays to be redirected back along their original path, making it useful in various applications. These prisms are commonly used in traffic signs, road safety, and optical devices. They enhance visibility at night by reflecting headlights from vehicles, ensuring that signs and markers are easily seen. Additionally, corner cube prisms are utilized in laser technology and surveying for precise measurements.