A spaceship flies past Mars with a speed of 0.985c relative to the surface of the planet. When the spaceship is directly overhead, a signal light on the Martian surface blinks on and then off. An observer on Mars measures that the signal light was on for 75.0 /μS. (a) Does the observer on Mars or the pilot on the space-ship measure the proper time? (b) What is the duration of the light pulse measured by the pilot of the spaceship?
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