An astronaut is traveling in a space vehicle that has a speed of 0.520c relative to Earth. The astronaut measures his pulse rate at 77 per minute. Signals generated by the astronaut's pulse are radioed to Earth when the vehicle is moving perpendicularly to a line that connects the vehicle with an Earth observer.
Evaluate the pulse rate does the Earth observer measure?
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Evaluate what would be the pulse rate if the speed of the space vehicle were increased to 0.910c?
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