But why would light "slow down"? | Visualizing Feynman's lecture on the refractive index
推荐理由
probably the clearest reasonably accessible explanation of this topic anywhere to date
强烈推荐jacobolus · 原文
说明
这是2023年由3Blue1Brown发布的一部讲解,主题归在Fundamental physics。它讲的是optics and refraction这一支里的具体问题,而不是把整个领域扫一遍。适合已经能看懂基本术语、想继续往下走的人。内容上可以概括成:3Blue1Brown visualizes Feynman's lecture on the refractive index, explaining why light appears to slow down in glass and why the effect depends on color. It builds the idea from waves produced by oscillating charges in the material.这些读者给出的理由,核心是:HN considers it among the clearest accessible explanations of what refractive index actually is and how light moves through transparent matter.讲法不绑某一条新闻,过几年仍然可以当材料看。从2023年到2026年,有5位不同的读者在5个不同月份把它推荐出来,其中明确叫别人去看的有1次。适合用一集把一个概念补上的人。抓住它用的那个图像或类比,比背公式重要。如果已经会了基本定义,就把注意力放在它怎么把optics and refraction变成能跟着复述的例子。
视频信息
- 频道
- 3Blue1Brown
- 时长
- 28 分 34 秒
- 发布年份
- 2023
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