电磁通论

Hacker News 上怎么说

• adrian_b · 2026 年

  ……关于物理量。然而，在物理教学中，这个内容要么教得很烂，要么根本不教，而不是去遵循经典范例——比如詹姆斯·克拉克·麦克斯韦，他在《电磁通论》（Treatise on Electricity and Magnetism）开篇就对物理量测量理论做了在当时既完备又前沿的阐述。平面角（又称相位角）不仅不是一个无量纲量，……

  …of physical quantities. However, when teaching physics frequently this is taught either badly or not at all, instead of following classical examples, like that of James Clerk Maxwell, who started his Treatise on Electricity and Magnetism with an exposition of the theory of the measurement of physical quantities that was complete and up-to-date for that time. The plane angle a.k.a. phase angle not only is not a dimensionless quantity,…

• mechanical_fish · 2008 年

  我非常赞同他关于阅读原著的建议。不过要注意，这个建议也有其弊端。我没尝试过读麦克斯韦最初的《电磁通论》（Treatise on Electricity and Magnetism），但我听人说那书读起来真的非常非常艰难。麦克斯韦方程组作为那个时代的奇迹，如今之所以能成为大二本科生的课程内容，全归功于奥利弗……

  I will second his recommendation to read original works. Be aware, though, that this recommendation does have a flip side. I haven't tried to read Maxwell's original Treatise on Electricity and Magnetism, but I've heard it said that it's really, really difficult to get through. The fact that Maxwell's equations, the marvel of their era, are now a subject for second-year undergraduates is due to Oliver…

• segfaultbuserr · 2024 年

  > 麦克斯韦其实也没怎么充分利用它们，总是把它们拆成标量和矢量部分。麦克斯韦真的用过四元数吗？如果我没记错的话，至少在《电磁通论》（A Treatise on Electricity and Magnetism）里，实际上并没有用到四元数。相反，他大部分工作都是在笛卡尔坐标系下完成的，所有方程都繁琐地应用到了矢量的 x、y、z 分量上。但很多资料都声称麦克斯韦用了……

  > Maxwell was also not really taking advantage of them much and always split them up into scalar and vector part. Did Maxwell actually use quaternions? If I recall correctly, at least in A Treatise on Electricity and Magnetism, quaternions were not actually used. Instead, he did most things in Cartesian coordinates, and all equations were applied to a vector's x, y, z components tediously. But many sources claimed Maxwell used…

• rramadass · 2026 年

  ……只要 HN 上有人声称自己读过/钻研过：a) 欧几里得的《几何原本》 b) 牛顿的《自然哲学的数学原理》 c) 麦克斯韦的《电磁通论》 d) 爱因斯坦 1905 年奇迹年论文 e) 罗素/怀特海的《数学原理》 f) 哥德尔不完备定理 g) 布尔巴基学派的数学著作等等，我一律直接无视（除非我查过他们的个人资料/历史评论/个人主页等）。他们可能只是出于好奇翻了翻，但那……

  …automatically discount anybody on HN (until i have looked at their profile/comment history/any personal bio websites etc.) who claim they have read/studied a) Euclid's Elements b) Newton's Principia c) Maxwell's Treatise on Electricity and Magnetism d) Einstein's 1905 Annus Mirabilis papers. e) Principia Mathematica by Russell/WhiteHead f) Godel's Theorem g) Bourbaki's mathematics books etc. etc. They might have browsed it out of curiosity but that…

• ben_w · 2018 年

  ……反例：早期有位研究素数的学者曾为自己的研究成果毫无用处而自豪，而如今它却成了一大类现代加密技术的基石。这可是经历了一两个世纪。又或者，麦克斯韦在 1873 年发表了《电磁通论》（A Treatise on Electricity and Magnetism），经过了 30 年才演变成语音无线电。当然，由于大型强子对撞机（LHC）直到 2012 年才发现希格斯玻色子，即使是你往少了估的 10 年，也还得再等四年。

  …Counterexamples: one of the early prime number researchers was proud that his work had no use at all, and now it’s the foundation of a major class of encryption. That was a century or two. Or, Maxwell published “A Treatise on Electricity and Magnetism” in 1873, and it took another 30 years to become voice radio. Of course, as the LHC only discovered the Higgs in 2012, even your 10 year lowball would be four years in the future.

• DoctorOetker · 2019 年

  severine 说的没错：就在《电磁通论》（A Treatise on Electricity and Magnetism）里，Internet Archive 上可以免费下载。第一卷 https://archive.org/details/electricandmagne01maxwrich 第二卷 https://archive.org/details/electricandmag02maxwrich 相关章节……

  severine is correct: it is in A Treatise on Electricity and Magnetism, which can be had free of charge from the Internet Archive. vol I https://archive.org/details/electricandmagne01maxwrich vol II https://archive.org/details/electricandmag02maxwrich The relevant section…

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