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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 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 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 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 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 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 an optical filter at 1.7 times the speed of light.

【OG20-P460-609题】

Which of the following statements about the earliest scientific investigators of quantum tunneling can be inferred from the passage?

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  • 分析B选项
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  • 分析C选项
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  • 分析D选项
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  • 分析E选项
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该题目由网友RMciZp提供。更多GMAT题目请
暂无雷哥网文字解析
当前版本由 感觉自己萌萌哒 更新于2015-11-03 11:09:04 感谢由 感觉自己萌萌哒 对此题目的解答所做出的贡献。
定位句:Though the extreme rapidity of quantum tunneling was noted as early as 1932, not until 1955 was it hypothesized-by Wigner and Eisenbud-that tunneling particles sometimes travel faster than light. 1932年之前,investigators是知道QTextreme rapidity 理论的,但是直到1955年,才提出了这个问题的假设:例子速度大于光速。根据逻辑,investigators当时没有承认:例子速度大于光速。符合D
A They found it difficult to increase barrier thickness continually. 原文无涉及
B They anticipated the later results of Chiao and his colleagues. 无涉及
C They did not suppose that tunneling particles could travel faster than light.
D They were unable to observe instances of successful tunneling. 无涉及
E They made use of photons to study the phenomenon of tunneling. 无涉及

题目讨论 4条评论)

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    Mariposa爱学习

    Though the extreme rapidity of quantum tunneling was noted as early as 1932, not until 1955 was it hypothesized—by Wigner and Eisenbud—that tunneling particles sometimes travel faster than light.
    文章没有明说谁是earliest scientific investigators,但是定位句已经可以看出1932年有那么一批人是最早研究这个项目的一批人。而且只提到了这么一次,那答案只有可能出现在这句话里面
    0 0 回复 2020-11-15 14:52:53
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    746860xgow

    Not until 1955 was A hypothesized = 55年之前没人提出 A=55年之前没人信A
    0 0 回复 2020-05-23 10:39:40
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    磨叽的猫子

    Though the extreme rapidity of quantum tunneling was noted as early as 1932, not until 1955 was it hypothesized—by Wigner and Eisenbud—that tunneling particles sometimes travel faster than light. 关键在于hypothesized,当时是假设而已
    1 0 回复 2020-04-03 00:41:16
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    1123

    答案就来源于这句话:Though the extreme rapidity of quantum tunneling was noted as early as 1932, not until 1955 was it hypothesized—by Wigner and Eisenbud—that tunneling particles sometimes travel faster than light.
    0 0 回复 2018-11-21 11:25:38
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