No. The radar only measures the speed of an object directly toward the radar gun. As it passes by, a car has zero velocity toward the radar gun. For reasonable accuracy, the radar gun must be some distance from a car approaching it.
No. The radar only measures the speed of an object directly toward the radar gun. As it passes by, a car has zero velocity toward the radar gun. For reasonable accuracy, the radar gun must be some distance from a car approaching it.
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Not unless the car is travelling as speeds near light-speed.