The first type of radar gun available to police officers uses radio waves. This type of radar sends the radio wave to target and back. Since radio waves move at a constant speed the radar can determine how far the target is based on the time it takes the waves to return. When the target is moving there is a change in the frequency that is detected by the radar and changed into miles per hour. Sounds like a lot of work, especially if you think about how fast it does all this. By the time you see the police officer chances are he already knows how fast you are going and can pull you over.
read the rest of the article at
http://www.writeups.pictyors.com/Article/How-The-Radar-Speed-Detection-Devices-Actually-Work/1506Linkback:
https://tubagbohol.mikeligalig.com/index.php?topic=41085.0
