Thanks for the lesson ... but I am VERY familuar with it, having been through the radar classes for the Longbow Apache.<quoted text>
question how do you know what car he was tracking
doppler radar unit that may be hand-held, vehicle-mounted or static.......it measures the speed of the objects at which it is pointed by detecting a change in frequency of the returned radar signal caused by the Doppler effect, whereby the frequency of the returned signal is increased in proportion to the object's speed of approach if the object is approaching, and lowered if the object is receding. Such devices are frequently used for speed limit enforcement
you were speeding
But, as long as your are playing radar professor, tell me about the resolution factor of radar ...
The radar wave that cops use isn't focused like laser ... when you point a radar gun at something, the radio wave is cone shaped, and anything in that cone will be seen.
The object that offers the largest "Return" is what is reported.
That isn't necessarily the largest object , or the fastest ... just the object that reflects the most.
That is the idea behind stealth aircraft. They combine a skin that absorbs the radio wave (reducing it's return)... and they use angles that project the radio signal away from it's source.
A small car speeding along with sharp angles offers less return than a car driving at the speed limit with many curves that reflects more.
So, it still comes down to what car the cop is looking at when the radar spits out that number ...