(ec) One of two twins launches in a rocket from Earth and accelerates to 0.9c. After one year, the rocket is turned around and is ignited in the opposite direction until the spaceship is traveling 0.9c back towards Earth. From inside the rocket ship, it looks like the twin on Earth raced away at 0.9c and returned at the same speed. Yet, when the first twin lands back on Earth, he is significantly younger than his twin. Briefly explain why.
(ec) One of two twins launches in a rocket from Earth and accelerates to 0.9c. After one year, the rocket is turned around and is ignited in the opposite direction until the spaceship is traveling 0.9c back towards Earth. From inside the rocket ship, it looks like the twin on Earth raced away at 0.9c and returned at the same speed. Yet, when the first twin lands back on Earth, he is significantly younger than his twin. Briefly explain why.
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Transcribed Image Text:(ec) One of two twins launches in a rocket from Earth and accelerates to 0.9c. After one year, the
rocket is turned around and is ignited in the opposite direction until the spaceship is traveling
0.9c back towards Earth. From inside the rocket ship, it looks like the twin on Earth raced away
at 0.9c and returned at the same speed. Yet, when the first twin lands back on Earth, he is
significantly younger than his twin. Briefly explain why.
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