Question

Winning an interstellar race, Mavis pilots her spaceship across a finish line in space at a speed of 0.600 relative to the line. A "hooray" message is sent from the back of her ship (event 2) at the instant (in her frame of reference) that the front of her ship crosses the line (event 1). She measures the length of the ship to be 300m. Stanley is at the finish line and is at rest relative to it. When and where does he measure events 1 and 2 to occur? Explain how causality is preserved here despite appearances to the contrary.

Answer 1

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