首页
登录
职称英语
Assuming that the engineering problems could be overcome, the production of
Assuming that the engineering problems could be overcome, the production of
游客
2024-01-01
23
管理
问题
Assuming that the engineering problems could be overcome, the production of a time machine could open up a Pandora’s box of causal paradoxes. Consider, for example, the time traveler who visits the past and murders his mother when she was a young girl. How do we make sense of this? If the girl dies, she cannot become the time traveler’s mother. But if the time traveler was never born, he could not go back and murder his mother.
Paradoxes of this kind arise when the time traveler tries to change the past, which is obviously impossible. But that does not prevent someone from being a part of the past.
Suppose the time traveler goes back and rescues a young girl from murder, and this girls grows up to become his mother. The causal loop is now self-consistent and no longer paradoxical. Causal consistency might impose restrictions on what a time traveler is able to do, but it does not rule out time travel per second.
Even if time travel isn’t strictly paradoxical, it is certainly weird. Consider the time traveler who leaps ahead a year and reads about a new mathematical theorem in a future edition of Scientific American. He notes the details, returns to his own time and teaches the theorem to a student, who then writes it up for Scientific American. The article is, of course, the very one that the time traveler reads. The question then arises: Where did the information about the theorem come from? Not from the time traveler, because he read it, but not from the student either, who learned it from the time traveler. The information seemingly came into existence from nowhere, reasonlessly.
The bizarre consequences of time travel have led some scientists to reject the notion outright. Stephen W. Hawking of the University of Cambridge has proposed a "Chronology protection conjecture," which would outlaw causal loops. Because the theory of relativity is known to permit causal loops, chronology protection would require some other factors to intercede to prevent travel into the past. What might this factor be? One suggestion is that quantum processes will come to the rescue. The existence of a time machine would allow particles to loop into their own past. Calculations hint that the ensuring disturbance would become self-reinforcing, creating a runaway surge of energy that would wreck the wormhole. [br] According to the passage, ______ plays an important role which cannot be ignored.
选项
A、the speed of time travel
B、the relationship between people
C、the destination of time travel
D、the length of time travel
答案
A
解析
推断题型通读全文,假设时间旅行者能在现在、过去甚至未来(见文中的各个例子)任意来往,那么显然时间旅行的速度是惊人的,因此答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/3323468.html
相关试题推荐
1Thefieldofeconomicsstudiesthebasicproblemsthateveryeconomymustface
1Thefieldofeconomicsstudiesthebasicproblemsthateveryeconomymustface
1Thefieldofeconomicsstudiesthebasicproblemsthateveryeconomymustface
BecauseofCanada’sabundantproductionandrelativelysmallpopulation,itisa
I’veknownseveralpeoplewhohaveovercomenail-bitingsimplybybuying50nail
Carbonmonoxidedoesn’tnormallycauseproblemsinawell-ventilatedareawhere
WhentheErieCanalwasbuiltinthe1820’s,itwastheengineeringmarvelofit
WhentheErieCanalwasbuiltinthe1820’s,itwastheengineeringmarvelofit
Hisemotionalproblems______fromhisexperiencesasachild,Ithink.A、stemB、
Greatereffortstoincreaseagriculturalproductionmust______iffoodshortagei
随机试题
[originaltext]W:Hi,ProfessorHiggins.M:Hi,Julia.W:Wouldyoubeabletoh
"MadeinChina"lostitsnoveltylongago.Thelabelhasbecome【C1】______in
EducationStudyFindsU.S.FallingBehind[A]TeachersintheUnite
下列关于套筒冠义齿基牙制备不正确的是()A.前牙切端及后牙面至少预备
()除依据《公司法》等法律法规和商业银行章程履行职责外,还应当重点监督评估
消费指标包括( )。 Ⅰ.金融机构存款总额 Ⅱ.外商投资总额 Ⅲ.城乡居
诊断间日疟取血最适宜的时间是()A.发作之际B.发作后数小时至十余小时C.发作
北宋史学家司马光主持编写了我国第一部编年体通史巨著,记述了从战国到五代l300多
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
企业采用权益法核算长期股权投资的,在确认投资收益时,不需考虑顺流交易产生的未实现
最新回复
(
0
)