Radar, which stands for Radio Detection and Ranging, is a detection system that uses radio waves to determine the range, angle, or velocity of objects. A radar system emits radio waves that bounce off targets and return to the receiver. By analyzing the characteristics of the reflected signal, such as the time delay and frequency shift, radar can provide information about the target's location, speed, and even shape. This technology is widely used in various applications, including air traffic control, weather forecasting, military defense, and autonomous vehicles.