The state highway patrol radar guns use a frequency of 8.85 GHz. If you\'re appr

Question

The state highway patrol radar guns use a frequency of 8.85 GHz. If you're approaching a speed trap driving 34.2 m/s, what frequency shift will your FuzzFoiler 2000 radar detector The radar gun measures the frequency of the radar pulse echoing off your car. By what percentage is the measured frequency different from the original frequency? (Enter a positive number for a frequency increase, negative for a decrease. Just enter a number, without a percent sign.) Your car "sees" a shifted frequency because it is the observer. Once this wave bounces off your vehicle, the car becomes the source and the radar gun becomes the observer.

Explanation / Answer

Because the wave is reflected there will be an additional frequecy shift of 1.09 * 10E3 giving a total
frequency shift of 2.18 * 10E3 at the radar gun (the moving car becomes a source whose emitting
frequency is 1.09 * 10E3 higher than that of the radar gun)

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