作者SakuraiJJ (樱井俊杰)
看板Physics
标题[题目] 狭相的问题
时间Thu Dec 3 21:49:48 2009
[领域] Special Relativity
[来源] Midterm Exam
[题目] Sally and Sam's spaceship (each of proper length 230m) pass each other
with constant speed v. Sally measures a time interval of 3.57x10^-6 sec for
Sam's ship to pass her. What's the relative Beta(=v/c) between Sally and Sam?
[瓶颈] 我的想法是，先做Lorentz's transformation算出Sally看Sam的长度L'，所以
Sam pass Sally的时间就是(L'+230m)/v = 3.57x10^-6 sec；由此算出Beta。但是题目是
说proper length = 230m，所以我搞不太懂230m到底是Lorentz's转换前还是转换後的长
度；也就是说我不知道是要用罗伦兹转换算Sally看Sam移动中的长度，还是要由移动中转
换到静止长度。麻烦板上强者帮忙了，谢谢。
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 118.171.115.116
1F：→ nightkid:应该要用midterm exam 12/03 22:08
感谢XD
※ 编辑: SakuraiJJ 来自: 118.171.115.116 (12/03 22:14)