But why would light "slow down"? | Visualizing Feynman's lecture on the refractive index
5 人推荐 · 跨 5 个月 · 2023–2026
中文导读
3Blue1Brown 将费曼关于折射率的物理讲义进行了高水准的动态可视化。从物质内部电荷振荡产生的二次波切入，直观阐释了光在玻璃中看似变慢的底层物理机制，以及色散现象的本质。
为什么 HN 推它
HN 网友公认迄今为止关于“折射率究竟是什么”以及“光如何在透明介质中传播”最通俗、最透彻的视觉解释标杆。
「这大概是迄今为止对该课题解释得最通俗透彻的视频，没有之一。」HN 网友原话：probably the clearest reasonably accessible explanation of this topic anywhere to date
英文原摘要（HackerTube / Claude 整理）
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.
HN considers it among the clearest accessible explanations of what refractive index actually is and how light moves through transparent matter.
HN 上的提及
probably the clearest reasonably accessible explanation of this topic anywhere to date
I found this 3blue1brown video to be a fascinating explaination on how light gets transmitted by transparent material
here’s a well done video explaining the topic of the apparent changes of light’s “speed” through materials
There's a very good video by 3Blue1BRown that explains this kind of weird concept way better than I could