共查询到20条相似文献,搜索用时 78 毫秒
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在狭义相对论时空观的教学中,关键是要抓住光速不变原理这条主线,使学生既能从严密的数学逻辑理解又能从物理本质理解.本文根据作者多年的教学实践,就此对狭义相对论时空观教学进行了讨论. 相似文献
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第1讲 狭义相对论的引入
相对性原理是牛顿力学的一个重要出发点.然而,麦克斯韦(以下简称麦氏)的电磁理论问世之后,相对性原理曾一度遭遇过严峻的挑战,最终导致狭义相对论的诞生.因此,要介绍狭义相对论的引入动机,有必要讲清以下三个问题:
1.什么是相对性原理?
2.麦氏电磁理论为何曾一度对相对性原理提出过严峻挑战?
3.上述挑战如何诱发爱因斯坦创立狭义相对论? 相似文献
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在敦硕鸿《电动力学》教学中狭义相对论的基础上对洛伦兹变换的条件作了讨论,问题的提出看似简单,却很基本。 相似文献
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电磁学教学中对称性分析的积极意义 总被引:2,自引:0,他引:2
爱因斯坦狭义相对论的提出,导致对称性观念在物理学研究中占有重要地位,对称性要求对自然定律的形式是一条强有力的限制,对称性成为现代物理中的主角.阐述了对称性分析在电磁学教学中的积极意义。 相似文献
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Mendel Sachs 《Foundations of Physics Letters》1988,1(2):163-169
Inertial mass in relativity theory is discussed from a conceptual view. It is shown that though relativistic dynamics implies a particular dependence of the momentum of a free particle on its velocityin special relativity, which diverges as v approaches c, the inertial mass itself of a moving body remains constant, from any frame of observation. However, extension to general relativity does conceptually introduce variability of the inertial mass of a body, through a necessarily generally covariant field theory of inertia, when the Mach principle is incorporated into the theory of general relativity, as a theory of matter. 相似文献
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本文总结了作者讲授电动力学与狭义相对论的若干心得与体会;运用四维闵可夫斯基空间张量的性质及其缩并运算法则,介绍了用各阶四维张量构造相对论不变量即四维标量的方法,进而在所得四维标量为负定的类时标量时,推导出若干典型的勾股关系,并应用或验证于若干简单情形. 相似文献
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E. M. Yahalomi 《Foundations of Physics Letters》1997,10(5):495-501
Time dilation in rotational movement is shown to be a combination of two different phenomena: time dilation of theory of special
relativity and time dilation of theory of general relativity. Two laboratory experiments are suggested to verify this. It
is also shown that the uncertainty principle is covariant in the weak field approximations. 相似文献
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在普通物理教学中以狭义相对论为基础,由库仑定律计算运动点电荷之间的作用力,从而可在理论上引出磁场定义和毕奥-萨伐尔定律。 相似文献
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Laws of mechanics, quantum mechanics, electromagnetism, gravitation and relativity are derived as “related mathematical identities” based solely on the existence of a joint probability distribution for the position and velocity of a particle moving on a Riemannian manifold. This probability formalism is necessary because continuous variables are not precisely observable. These demonstrations explain why these laws must have the forms previously discovered through experiment and empirical deduction. Indeed, the very existence of electric, magnetic and gravitational fields is predicted by these purely mathematical constructions. Furthermore these constructions incorporate gravitation into special relativity theory and provide corrected definitions for coordinate time and proper time. These constructions then provide new insight into the relationship between manifold geometry and gravitation and present an alternative to Einstein’s general relativity theory. 相似文献
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相对性原理及其对自然界定律的协变性要求--机械能守恒定律协变性疑难的解答 总被引:1,自引:1,他引:0
阐明狭义相对性原理的准确含义,批出它并不要求自然界每条定律都单独协变,但要求每条定律至少属于一个协变集合,给出最小协变集的求法。表明机械能守恒定律满足狭义相对性原理及其对自然界定律的协变性要求,还指出一切社会科学定律也都满足狭义相对性原理。 相似文献
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狭义相对论中的重力及"潜水艇佯谬" 总被引:1,自引:0,他引:1
在狭义相对论范畴内,如果考虑地球周围较小区域内的动力学问题,可以用均匀质量密度的无限大平面产生的重力场替代地球的史瓦西场,从而得到较为简单的重力表达式.在此基础上可以很方便地解释所谓的"潜水艇佯谬". 相似文献
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David Shelupsky 《Foundations of Physics Letters》1996,9(5):475-487
We construct classical theories of gravity on the basis of special relativity and the Einstein-Infeld accelerating-elevator thought experiment. The resulting theories share most of the main features of general relativity, namely the nonlinear character of the theory, the metrical significance of the gravitational potentials and the geodesic equation of particle motion. They differ from general relativity in at most nonlinear terms in the gravitational constant G in their equations of particle motion and field equations. 相似文献
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E. Comay 《Foundations of Physics Letters》1997,10(3):245-254
The longitudinal magnetic field ascribed by Evans to a circularly polarized electromagnetic wave is discussed. It is proved
that this theory is inconsistent with special relativity. 相似文献