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If a year passes on a ship traveling 60 percent light speed how many years have passed on earth?
Wiki User
∙ 11y ago
For the traveller, the trip takes 1 year, travelling at 60% the speed of light (or 0.6C). This would mean that he will perceive himself as have travelled 0.6 light years (a distance of about 9.46x1012km). To calculate the time that has elapsed on Earth, you can use this simplified equation:
Spaceship Time = Earth Time x sqrt[1-(v/c)2]
Spaceship Time = Earth Time x sqrt[1-(0.6c/c)2]
Spaceship Time = Earth Time x sqrt[1-(0.6)2]
Spaceship Time = Earth Time x sqrt[1-0.36]
Spaceship Time = Earth Time x sqrt[0.64]
Spaceship Time = Earth Time x 0.8
Spaceship Time = 1 year
1 year spaceship = Earth Time x 0.8
Earth Time = 1 year spaceship / 0.8
Earth Time = 1.25 years
Thus, after 1 year has passed for the person on the spaceship, 1.25 years have passed on Earth.
Wiki User
∙ 11y ago
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