Electromagnetic Waves I
A police car on the side of the road (at rest) uses a radar gun to catch speeders as they approach it.
The frequency the radar gun emits is 8 x 109 Hz and the speed limit is 65 mi/hr.
What is the difference in frequency of the emitted and returned radar wave? (A positive answer
means the returned wave has a greater frequency than the emitted wave; a negative answer
means the returned wave has a smaller frequency than the emitted wave.)
freturned - femitted = Hz
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