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Quantum theory, although of tremendous scientific value, has nevertheless prompted debate among physicists. The debate arose because quantum theory addresses the peculiar properties of minute objects such as photons and electrons. While one type of experiment shows that these objects behave like particles, with well-defined trajectories through space, another demonstrates that, on the contrary, they behave waves, their peaks and troughs producing characteristic "interference" effects. However, scientists have failed to devise an experiment to demonstrate both behaviors simultaneously.

In the 1920s, two alternate interpretations of quantum theory attempted to resolve this apparently contradictory wave-particle duality. Physicist Niels Bohr argued that wave-particle properties are not contradictory, but complementary. Contrary to our intuition that an object continues to exist in some determined form even though we cannot perceive it, he concluded that the physical of a quantum object is actually undetermined before the object is observed via experiment.

Physicist Werner Heisenberg's "uncertainty principle," by contrast, postulated that we cannot precisely determine two complementary properties, such as position and momentum, of a quantum object simultaneously: if we measure an object's position with absolute certainty, then there is an infinite uncertainty in its momentum, and vice versa. He concluded that although we are limited in our ability to measure objects at the atomic and subatomic levels, their position and momentum are nonetheless defined all along.

Which of the following does the passage mention as providing evidence of the dual nature of quantum objects?

  • 分析A选项
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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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当前版本由 七剑飘一飘 更新于2015-10-09 14:14:36 感谢由 七剑飘一飘 对此题目的解答所做出的贡献。
文章结构:
点明主旨:Quantum theory的争论
1 争论的原因
2 关于争论的不同观点
3对于不同的观点的评价
4 为了解决争论,有2个不同的观点


Which of the following does the passage mention as providing evidence of the dual nature of 
quantum objects? 
A. Scientists’ inability to measure the position and momentum of quantum objects simultaneously 
B. Scientists‘ inability to measure the momentum of quantum objects with certainty 
C. The similarities in the appearance of particles and waves 
D. The tendency of quantum objects to exhibit well-defined trajectories only at either extremely 
high or extremely low speeds 
E. The behavior of quantum objects as either particles or waves depending on the type of 
experiment that is performed 

题目讨论 (5条评论)

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    Byrant

    定位this apparently contradictory wave-particle duality。然后evidence往上面找While one type of experiment shows that these objects behave like particles, with well-defined trajectories through space, another demonstrates that, on the contrary, they behave waves, their peaks and troughs producing characteristic "interference" effects.这就是选项:particles/waves
    0 0 回复 2019-09-11 11:28:27
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    Diana学霸

    he concluded that the physical of a quantum object is actually undetermined before the object is observed via experiment.
    0 0 回复 2018-12-31 19:26:10
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    茯苓

    dual不懂什么意思所以选错了……dual nature就是指二象性,说的就是波粒二象性,所以ABC科学家如何如何立刻能排除。E说的就是量子的表现根据实验的不同而不同,即是说呈现出来的波特性和粒子特性
    0 0 回复 2018-10-18 10:44:00
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    xiaoyi

    on the type of experiment 这里也够暧昧了!!
    0 0 回复 2017-08-27 08:49:07
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    Jerrywin

    dual nature of quantum objects就是第一段中所讲的波粒二象性。第一段最后一句说However, scientists have failed to devise an experiment to demonstrate both behaviors simultaneously.所以wave的特性跟particle的特性是通过不同实验显示的
    0 0 回复 2017-03-03 22:10:46
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