A radar gun used by a police officer measures your speed at a certain instant in time.
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Question:
A radar gun used by a police officer measures your speed at a certain instant in time. On the other hand, an officer in a plane measures the time it takes for you to travel the known distance between two stripes painted on the highway.
What is the difference in nature between these two types of measurement?
Which method would be better for picking out an erratic driver who sporadically zips past cars then lags a bit? Which would be easier to foil?
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