英语论文网

留学生硕士论文 英国论文 日语论文 澳洲论文 Turnitin剽窃检测 英语论文发表 留学中国 欧美文学特区 论文寄售中心 论文翻译中心

Bussiness ManagementMBAstrategyHuman ResourceMarketingHospitalityE-commerceInternational Tradingproject managementmedia managementLogisticsFinanceAccountingadvertisingLawBusiness LawEducationEconomicsBusiness Reportbusiness planresearch proposal

英语论文题目英语教学英语论文商务英语英语论文格式商务英语翻译广告英语商务英语商务英语教学英语翻译论文英美文学英语语言学文化交流中西方文化差异英语论文范文英语论文开题报告初中英语教学英语论文文献综述英语论文参考文献

ResumeRecommendation LetterMotivation LetterPSapplication letterMBA essayBusiness Letteradmission letter Offer letter

澳大利亚论文英国论文加拿大论文芬兰论文瑞典论文澳洲论文新西兰论文法国论文香港论文挪威论文美国论文泰国论文马来西亚论文台湾论文新加坡论文荷兰论文南非论文西班牙论文爱尔兰论文

小学英语教学初中英语教学英语语法高中英语教学大学英语教学听力口语英语阅读英语词汇学英语素质教育英语教育毕业英语教学法

英语论文开题报告英语毕业论文写作指导英语论文写作笔记handbook英语论文提纲英语论文参考文献英语论文文献综述Research Proposal代写留学论文代写留学作业代写Essay论文英语摘要英语论文任务书英语论文格式专业名词turnitin抄袭检查

temcet听力雅思考试托福考试GMATGRE职称英语理工卫生职称英语综合职称英语职称英语

经贸英语论文题目旅游英语论文题目大学英语论文题目中学英语论文题目小学英语论文题目英语文学论文题目英语教学论文题目英语语言学论文题目委婉语论文题目商务英语论文题目最新英语论文题目英语翻译论文题目英语跨文化论文题目

日本文学日本语言学商务日语日本历史日本经济怎样写日语论文日语论文写作格式日语教学日本社会文化日语开题报告日语论文选题

职称英语理工完形填空历年试题模拟试题补全短文概括大意词汇指导阅读理解例题习题卫生职称英语词汇指导完形填空概括大意历年试题阅读理解补全短文模拟试题例题习题综合职称英语完形填空历年试题模拟试题例题习题词汇指导阅读理解补全短文概括大意

商务英语翻译论文广告英语商务英语商务英语教学

无忧论文网

联系方式

关于什么是爱因斯坦的等效原理 [5]

论文作者:佚名论文属性:短文 essay登出时间:2009-04-20编辑:黄丽樱点击率:19539

论文字数:10591论文编号:org200904201238242119语种:英语论文 English地区:中国价格:免费论文

关键词:general theoryimportanceEinstein’s equivalence principlechallengedunderstanding

ciple is a dynamic principle. To appreciate Einstein’s ingenuity, it would be easier to start from his paper of 1911, where he found that his equivalence principle is compatible with the Doppler effects and even the notion of p hoton. Thus, Einstein’s equivalence principle has been firmly established on the ground of universality of physics. Since the notion of curved space would produce a second order effect in his consideration of the effect of gravitational red shifts [1], Einstein’s 1911 derivation of the red shifts is valid. Einstein assumed that the mechanical equivalence of an inertial system K under a uniform gravitational field, which generates a gravitational acceleration g (but, system K is free from acceleration), and a system K' accelerated by g in the opposite direction, can be extended to other physical processes. He considered two material systems S1 and S2 which are situated initially at rest on the z-axis of system K and are separated by a distance h so the gravitation potential in S2 is greater that S1 by gh. If a definite radiation energy E2 be emitted from S2 to S1 at the moment that system K' has zero velocity relative to an inertial system K0, the radiation will arrive at S1 when the time h/c has elapsed (to a first order approximation); and at this moment the velocity of S1 relative to K0 is gh/c = v. According to special relativity, the radiation arrives S1 with a greater energy E1 which (to a first order approximation) is related to E2 by E1 = E2(1 + v/c) = E2(1 + gh/c2) (2) The above is consistent with, E = mc2 in the sense of mass-energy conservation [20]. By assumption, exactly the same relation holds if the same process takes place in the system K, which is not accelerated, but is provided with a gravitational field. Then, gravity must act also on radiation, and we may replace gh by the gravitational potential F and obtain E1 = E2(1 + F/c2) = E2 + F(E2/c2). (3) Thus, the energy increment of radiation due to gravity is resolved by the equivalence of the K and K' systems. If the radiation emitted in the uniformly accelerated system K' in S2 towards S1 had the frequency n2 relatively to the clock in S2, then at the arrival of radiation in S1, it has a greater frequency n1 relatively to S1, such that to a first approximation n1 = n2(1 + g h/c2) (4a) If the radiation is emitted at time that K' has no velocity, S1 at the time of arrival of the radiation, has relative to K, the velocity gh/c. Eq. (4a) is an immediate result of the Doppler's principle. If gh is substituted by the gravitational potential F of S2 - that of S1 being taking as zero - then the equivalence principle, to the first order approximation gives n1 = n2(1 + F /c2). (4b) If on the surface of a star (where S2 is located) the light is emitted to the Earth (S1) where the frequency of the arriving light is measured, then eq. (4b) implies n = n0(1 + F/c2), where F is the (negative) difference of gravitational potential between the surface of the star and the Earth. Also, if (3) and (4) are compared, then one would conjecture that the energy of a photon be E = k n, &nb sp; 论文英语论文网提供整理,提供论文代写英语论文代写代写论文代写英语论文代写留学生论文代写英文论文留学生论文代写相关核心关键词搜索。

相关文章

    英国英国 澳大利亚澳大利亚 美国美国 加拿大加拿大 新西兰新西兰 新加坡新加坡 香港香港 日本日本 韩国韩国 法国法国 德国德国 爱尔兰爱尔兰 瑞士瑞士 荷兰荷兰 俄罗斯俄罗斯 西班牙西班牙 马来西亚马来西亚 南非南非

       Europe (24-hours)
       EN:13917206902
       china (24-hours)
       CN:13917206902
    
    在线客服团队
        全天候24小时在线客服
          QQ:949925041 
      

    微信公众订阅号