How dose the radar work ?

Question:

Answers:

Radar uses microwave energy,,,simmilar to your microwave oven,,but at different frequencies.
The radar rotating dish sends out a pulse of microwave energy from the emitter,,,and the waves bounce off what ever is in their range,,and the reciever picks up the returned waves which have been disturbed/reflected by objects in their path,,,and interperates them into blips on a screen.

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And for speed detecting radar, the waves that Thunder describe are compared on their way out, and then back in.

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Picture a police car northbound, and a suspect car southbound, approaching the police car.

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One radar beam reflects off the majority of the "big stuff" around the police car, and interprets this as the officer's road speed. The radar waves that hit an oncoming car and return will have their wave "crests" passing through the receiver faster than the "road waves" (for lack of a good, non-technical term), and the radar unit will do a simple calculation to subtract the officer's road speed from the "closing speed" of the two vehicles, to give the speed of the oncoming car.

Which will give a more accurate speed reading sat nav or car speedo?

RADAR sends out an electromagnetic wave about the size of a microwave. It bounces off a car and returns. The time that it takes to go and return is read and the speed of the car can be determined. We know the rate that these waves travel through the air, so the total time to go and return will tell the speed difference of the car.

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How dose the radar work ?

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