Question:

Can stationery police radar go through trees accurately?

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Can stationery police radar go through trees accurately?

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3 ANSWERS


  1. im going to bet yes


  2. "Can stationery police radar go through trees accurately?"

    The short answer is NO. But...police radar can measure speed AROUND trees (and around curves) quite accurately.

    Police radar works by emitting a radio beam that travels through the air, is reflected by objects, and then is received back at the radar gun. The change in the frequency of the radar beam when it returns to the gun can indicate how fast the object(s) were moving when they were hit by the beam. This change in radar frequency is known as the Doppler Shift. Measuring the amount of Doppler Shift in the radar beam that returns to the gun is a measure of the speed of the object that the beam bounced off of. Radar can not detect movement THROUGH a tree any more than it can detect movement THROUGH a block of cement. Around? Yes. Through? No.

    Police can aim a radar gun down a canyon, for example, and measure the speed of vehicles on that road without even being able to SEE the vehicles. They point the radar down the road, where everything but cars and trucks is essentially stationery. The only thing moving is your car or truck. Therefore, the speed measured inside the canyon is the speed of your vehicle. (Or maybe a very large bird flying around the canyon at 75 miles per hour? Not likely!)

  3. yes very well actually

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