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[Reading Comprehension]
试题详情
文章：
| Line | Most attempts by physicists to send particles |
| faster than the speed of light involve a remarkable | |
| phenomenon called quantum tunneling, in which | |
| particles travel through solid barriers that appear | |
| (5) | to be impenetrable. If you throw a ball at a wall, |
| you expect it to bounce back, not to pass straight | |
| through it. Yet subatomic particles perform the | |
| equivalent feat. Quantum theory says that there is a | |
| distinct, albeit small, probability that such a particle | |
| (10) | will tunnel its way through a barrier; the probability |
| declines exponentially as the thickness of the | |
| barrier increases. Though the extreme rapidity of | |
| quantum tunneling was noted as early as 1932, | |
| not until 1955 was it hypothesized—by Wigner and | |
| (15) | Eisenbud—that tunneling particles sometimes |
| travel faster than light. Their grounds were | |
| calculations that suggested that the time it takes a | |
| particle to tunnel through a barrier increases with | |
| the thickness of the barrier until tunneling time | |
| (20) | reaches a maximum; beyond that maximum, |
| tunneling time stays the same regardless of | |
| barrier thickness. This would imply that once | |
| maximum tunneling time is reached, tunneling | |
| speed will increase without limit as barrier thickness | |
| (25) | increases. Several recent experiments have |
| supported this hypothesis that tunneling particles | |
| sometimes reach superluminal speed. According to | |
| measurements performed by Raymond Chiao and | |
| colleagues, for example, photons can pass through | |
| (30) | an optical filter at 1.7 times the speed of light. |
题目：
The author of the passage mentions calculations about tunneling time and barrier thickness in order to
选项:
A、suggest that tunneling time is unrelated to barrier thickness
B、explain the evidence by which Wigner and Eisenbud discovered the phenomenon of tunneling
C、describe data recently challenged by Raymond Chiao and colleagues
D、question why particles engaged in quantum tunneling rarely achieve extremely high speeds
E、explain the basis for Wigner and Eisenbud’s hypothesis
答案:
E
提问：
老师这道题B和E有什么区别？
解答：
点赞1
阅读1944
提问：
老师这道题B和E有什么区别？
解答：
点赞1
阅读1945
提问：
老师您好，我不是想问这道题，想问文章的逻辑链，请老师帮我看看我总结的逻辑链有没有什么问题：
全文主要在解释一个q t的现象，分为三个部分：1.现象的定义和原理解释 2.W和E这两个人的理论和证据 3.关于q t的最新研究
具体逻辑链：1.q t：原理：speed>light & through the barrier
补充：thickness高，through难
2.W、E：speed>light
calculation证明： thickness高，time长，
time到max，speed无限制
3.新研究：支持speed>light
R C 例证
我会不会读文章读的太细？
麻烦老师讲一下您读这篇文章时的逻辑思路，非常感谢！
解答：
点赞0
阅读1937
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