本题目来源于试卷: Length Contraction and Time Dilaton，类别为 美国物理杯赛(Physics Bowl)
[单选题]
14.50: Two clocks, A and B,a-9/cxrbz2 mr/ qil 0u+elb2y gqxmw 9o1acu, ia) p. et*b6z:/i. vdcare synchronized on Earth. Clock A is placed onto a space ship that leaves Earth in a straig d.cegi awv.zmo/p6)t9 xiu:1*acqb ,ht line with a speed of $2.40\times\: 10^8$ m/s. On Earth, a scientist with clock B has her telescope fixed directly on clock A. If each clock started at t = 0 s, what time does the scientist observe on clock A when clock B reads t = 90 s ? Assume the time of acceleration for the ship leaving the Earth was negligible.
A. 24 s
B. 30 s
C. 50 s
D. 54 s
E. 72 s
参考答案: B
本题详细解析:
暂无
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