Physics Unit26: Special Theory of Relativity (id: ff57b2908)

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本题目来源于试卷: Physics Unit26: Special Theory of Relativity，类别为 Generic Physics

[单选题]
One 20-year-old twin brother takes a space trip with a speedl9ea+d .0 gtwl 8,iq+g/ bvynsof 0.80c for 30 years according to a clock on the spaceship. Upon returning to the Earth, what is his own age and the age of the Earth-based twin bbgnvy i,/8 +sqrother?

A. 20; 30
B. 30; 50
C. 50; 70
D. 70; 90


参考答案:  C


本题详细解析: 暂无