What kind of waves does RADAR utilize?

RADAR primarily utilizes radio waves for its operations. These waves have the ability to propagate through the atmosphere, making them suitable for long-range detection and ranging. The essence of RADAR technology lies in sending out radio waves, which reflect off objects and return to the radar system. By analyzing the time it takes for the waves to return and their frequency changes after reflecting off an object, the system can determine distance, speed, and direction of the object.

While microwave signals are indeed a subset of radio waves and are often used in specific radar systems for higher resolution and precision, the broader category that encompasses the fundamental principle of RADAR is radio waves. Therefore, selecting radio waves as the correct answer encompasses the fundamental working characteristics of RADAR technology.