Winning an interstellar race, Mavis pilots her spaceship across a finish line in space at a speed of 0.600c relative to that 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 her ship to be 300 m. 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?

Winning an interstellar race, Mavis pilots her spaceship across a finish line in space at a speed of 0.600c relative to that 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 her ship to be 300 m. 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?