A police officer's radar gun emits radio waves at a frequency of 10.7 GHz10.7 GHz. What is the difference in the frequencies reflected back to the radar gun by a car traveling at the 75 mph75 mph speed limit and a car travelling 9 mph9 mph faster? Assume that the cars are both headed directly away from the stationary officer.

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Physics

Jamal Wolf

8 June, 18:12

A police officer's radar gun emits radio waves at a frequency of 10.7 GHz10.7 GHz. What is the difference in the frequencies reflected back to the radar gun by a car traveling at the 75 mph75 mph speed limit and a car travelling 9 mph9 mph faster? Assume that the cars are both headed directly away from the stationary officer.

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Cecilia Huber · Answer 1

A police car's radar gun emits microwaves with frequency f. 1. = 36 GHz. The beam reflects from a car that speeds away from the cruiser with 43 m/s. The receiver ...