Radar is a form of technology that was developed so that it could secretly be used by the military. In the early years of 1949s, the United States Navy coined the word “radar” as an acronym to stand for Radio Detection and Ranging (RADAR). Thus, radar was then used help the army detect enemies’ aircraft, especially during the first world war.
Today, radar is widely being used in almost everything from weather forecasting to speed detectors for police officers. They use ultra-high frequency waves to electronically detect the range as well as the direction of any moving objects.
Radar works with a concept of the reflection of light. Basically, when light reflects in objects, we are able to see the objects with our eyes and similarly, when radio waves/beams are transmitted or reflected by an object, a signal is sent out that helps in reflecting of beams of any objects along the similar path. Simply said, radar uses a similar communication that bats use when they fly at night or in the dark.