with a radar gun
It measures the time it takes for the radar pulse to go from the radar gun to your vehicle and back. The pulse is fairly constant so the radar gun is getting updates and by comparing the updates to the time it can determine speed.
A radar gun only works when there's a free line-of-sight betweent he gun and its target vehicle.
A radar gun can detect the speed of vehicles of up to 1 mile, on an average. It depends on the radar gun's make and model, it may detect farther than 1 mile.
Only if he has his radar gun on. Radar detectors are not cop detectors.
As far as I know, radar was invented by a Hungarian scientist named Zoltan Bay. That radar was first used in World War II by the British troops.
1935
If the Radar gun is part of traffic camera (like red light cameras) yes, but if it is the usual hand held radar gun, then it does not assist the police in detecting your license plate.
Radar gun.
get a radar gun.
Radar was first put on ships during WW2.
The newly invented radar.