The control panel on a spaceship contains a light that blinks every 2.76 s as observed by an astronaut in the ship. If the spaceship is moving past Earth with a speed of 0.693c, determine the proper time interval between blinks and the time interval between blinks as observed by a person on Earth.   (a) the proper time interval (in s) between blinks  ?s (b) the time interval (in s) between blinks as observed by a person on Earth  ?s

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