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有关引力波的发现英语阅读About l.3 billion years ago two massive

时间:2016-03-14 09:59  作者:admin  来源:未知

 About l.3 billion years ago, two massive black holes hit each other and formed a new one. The energy set free by the collision created a ripple(波纹) in the space-time structure and spread outward in gravitational waves  ( 引力波 )  .
     Then, on September 14, 2015, a group of scientists discovered the waves. On February 11, an announcement came from the Laser Interferometer Gravitational-Wave Observatory (LIOO) in the US that, for the very first time, a gravitational wave was directly observed and recorded.
 "We discovered gravitational waves. We did it," David Reitze, the director of LIGO, said in the press conference on February 11. "It's exactly what Einstein's theory of general relativity predicted:'
     Einstein's 1915 theory re-imagined the framework for the universe. According to Einstein, the framework for the universe-or the space-time structure-is not fixed, but changed by matter and energy "in a way a heavy sleeper causes a mattress to sag (床垫下凹) , producing the effect we call gravity", explains a New York Times article.
     "A disturbance in the universe could cause space-time to become larger, break into pieces and even move up and down, like a mattress shaking when that sleeper rolls over, producing ripples of gravity: gravitational waves," explains the article.
        Compared with the other three forces in the universe (electromagnetism, the weak nuclear force and the strong nuclear force), gravity is relatively weak, making gravitational waves hard to discover.
     The discovery by LIGO would open a new chapter in astronomy. "Everything else in astronomy is like the eye," Szabolcs Marka, a Columbia University professor, told The New York Times. "Finally, astronomy grew ears. We never had ears before."
 32. What is a gravitational wave according to the text?
    A. It's a disturbance in the universe.          B. It's the crash of the two black holes.
   C. It's a ripple in the space-time structure.      D. It's an effect caused by energy.
 33. Why is the discovery by LIGO important?
   A. It proves Einstein's 1915 theory.        B. The waves were hard to discover.
    C. The waves changed the universe.        D. It reshapes the space-time structure.
34. What can we learn from the text?
    A. It took LIGO 4 months to confirm the discovery.
    B The framework for the universe can be changed
    C. One produces gravity because he sleeps heavily
    D. There are more than four forces in the universe.
35. What is the last paragraph mainly about?
    A. Astronomy calls for more attention.
    B. Never before has astronomy achieved much.
    C Astronomy is more about what we can hear in space.
    D.A better understanding of the universe is made possible.


原题来自2016年3月厦门高三质检英语试题


答案 32-35   CABD

有关引力波的解释:来自百度百科

在物理学中,引力波是指时空弯曲中的涟漪,通过波的形式从辐射源向外传播,这种波以引力辐射的形式传输能量。在1916年 ,爱因斯坦基于广义相对论预言了引力波的存在。引力波的存在是广义相对论洛伦兹不变性的结果,因为它引入了引入了相互作用的传播速度有限的概念。相比之下,引力波不能够存在于牛顿的经典引力理论当中,因为牛顿的经典理论假设物质的相互作用传播是速度无限的。


各种各样的引力波探测器正在建造或者运行当中,比如 advanced LIGO(aLIGO)从2015年9月份开始运行观测。


可能的引力波探测源包括致密双星系统(白矮星,中子星和黑洞)。在2016年2月11日,LIGO科学合作组织和Virgo合作团队宣布他们已经利用高级LIGO探测器,已经首次探测到了来自于双黑洞合并的引力波信号.


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