Question: A futuristic train moving in a straight line with a uniform speed of 0.80c passes a series of communications towers. The spacing between the towers,

A futuristic train moving in a straight line with a uniform speed of 0.80c passes a series of communications towers. The spacing between the towers, according to an observer on the ground, is 3.0 km. A passenger on the train uses an accurate stopwatch to see how often a tower passes him.
(a) What is the time interval the passenger measures between the passing of one tower and the next?
(b) What is the time interval an observer on the ground measures for the train to pass from one tower to the next?

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