Twin “Paradox”Rocket Twin is Younger!

• The key is: The Rocket Twin accelerated while the Earth Twin didn’t! The acceleration distinguishes the two twins and prevents us from applying the principle of relativity.

• The Calculation: Identify 3 Events:

• The Rocket Twin measures proper time for both time intervals: 1-2 and 2-3. Therefore the Rocket Twin measures the smallest time interval from 1-3!

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