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[GMAT阅读题讨论] PREP2012阅读第12篇第6题

icetong123 发表于 2015-1-9 15:45:51 | 显示全部楼层 |阅读模式
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.

The passage suggests that the debate among physicists mentioned in the first sentence has
arisen in part because
A. the rapid movement of quantum objects poses an insurmountable obstacle to precise
B. scientists have been unable to devise a single experiment that reveals both particle and
wave properties of quantum objects simultaneously
C. the controversial nature of quantum theory has made it for scientists to agree on what
evidence is acceptable
D. division among physicists has resulted in the design of experiments that produce
unintelligible experimental results
E. research efforts have been undermined by irreconcilable contradictions between equally
compelling interpretations of quantum theory




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