I've read on stickies and many different websites how radar works but I am still a bit confused. Let's say a cop is on the side of the highway with his gun on and there are 3 cars that are about 2 miles away all speeding at 90 mph. Does the cop actually have to directly see the car and then aim specifically at one to get a result? Or do the radar waves just flow out and hit the cars even though he can't see them? If so, then it would probably hit all 3 cars so do 3 speeds show up on the radar gun? i know that with lidar guns the cop has to directly aim at one specific car but apparently with radar guns you don't need good aim? Thanks.