Question: An engineer in a train moving toward the station with a velocity v = 0.60c lights a signal flare as he reaches a marker 1.0

An engineer in a train moving toward the station with a velocity v = 0.60c lights a signal flare as he reaches a marker 1.0 km from the station (according to a scale laid out on the ground). By how much time, on the stationmaster's clock, does the arrival of the optical signal precede the arrival of the train?

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