检索结果-南通市图书馆

Light Refraction and Reflection near a Black Hole

Journal of High Energy Physics, Gravitation and Cosmology 2022年第1期8卷 228-236页

作者： Young Hwan Yun Kiho Jang Zero Theoretical Physics Laboratory Seoul Republic of Korea

In this paper, we have calculated the angle of refraction that light travels approaching to the strong gravitational field like a black hole by combining the general relativity and the classical snell’s law, assuming that the gravitational field can act as a non-vacuum filled with medium of some coefficients. We have found that the value of refracted angle exactly coincides with the value from the Einstein’s relativity theory in a weak gravitational field. From this optical interpretation of the traveling of light near a black hole, we have suggested that there might have the reflection phenomenon and investigated that the total reflection occurs at the surface of a black hole. Regardless this might cause controversy, we can explain the recent observation that light reflects from a black hole.

关键词： Black Hole snell’s law Relativity Refraction Reflection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Comparison between Abraham and Minkowski Momenta

引用

Journal of Modern Physics 2016年第3期7卷 320-328页

作者： Massimo Testa Dipartimento di Fisica Università degli Studi di Roma “La Sapienza” INFN—Sezione di Roma IPiazzale A. Moro 2 Roma Italy

In this paper I compare the Abraham and the Minkowski forms for the momentum pertaining to an electromagnetic wave inside a dielectric or a magnetic material. The discussion is based on a careful treatment of the surface charges and currents and of the forces acting on them. While in the dielectric case the Abraham momentum is certainly more appealing from the physical point of view, for a magnetic material it suggests an interpretation in terms of magnetic charges and related magnetic currents. The Minkowski momentum for magnetic non conducting materials, on the contrary, has a natural interpretation in terms of an amperian model, in which the dynamics is determined by the Lorentz force acting on bulk and surface electric currents.

关键词： Abraham-Minkowski Controversy Forces on Dielectric and Magnetic Materials snell’s law

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

sUB-TRIANGLE sHOOTING RAY-TRACING IN COMPLEX 3D VTI MEDIA

SUB-TRIANGLE SHOOTING RAY-TRACING IN COMPLEX 3D VTI MEDIA

引用

中国科学院地质与地球物理研究所2008学术年会

作者： TAO XU~1.ZHONGJIE ZHANG~1,AIHUA ZHAO~2,ANJIA ZHANG~1,XI ZHANG~1 and HONGsHUANG ZHANG~1 1 state Key Laboratory of Lithosphere Evolution,Institute of Geology and Geophysics.Chinese Academy of sciences,China. 2 Institute of Geology and Geophysics,China Earthquake Administration,China.

We model a complex 3D anisotropic structure as an aggregate of arbitrarily shaped blocks or volumes separated by triangulated interfaces,and different anisotropic parameters can be defined in different blocks.In anisotropic media,seismic wave travels in the direction of ray vectors with group velocities throughout a ray trajectory,therefore,group velocities expressed by ray angles is required,but difficult to express in terms of phase angles.An approximate expression in terms of ray angles is derived for weak transversely isotropic media with a vertical symmetry axis(VTI).We also propose a simple iterative process to calculate ray angles in terms of the snell’s law still valid for phase velocities and phase angles.Modification of shooting angles is crucial in implementing 3D shooting ray-tracing,and we suggest to use the sub-triangle shooting method to update the shooting angles to enhance the computing efficiency.Numerical tests demonstrate that a blocky model can be a good description of complex 3D VTI media and the sub-triangle shooting ray-tracing is very effective to implement for kinematics two-point ray-tracing.

关键词： phase velocity group velocity snell’s law ray-tracing.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Multi-hop HF Radio Propagation

引用

校园英语 2018年第35期 254-254页

作者：秦丽陈世祥郑迪阳重庆邮电大学光电工程学院

Based on electromagnetic boundary conditions, we build radio wave reflection model on the calm ocean. By applying snell’s law, we determine the reflection coefficient of ocean surface and then use MATLAB to obtain th... 详细信息

关键词： Multi-hop HF Radio Propagation snell’s law

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：