Why is light slower in glass? - Sixty Symbols
推荐理由
This reminds me of this Sixty Symbols video which explains why light is slower in media such as glass than in a vacuum
说明
这是2013年由Sixty Symbols发布的一部讲解,主题归在Fundamental physics。它讲的是refraction of light这一支里的具体问题,而不是把整个领域扫一遍。适合按兴趣直接看、不打算先补课的人。内容上可以概括成:Professor Mike Merrifield of Nottingham explains in a mostly uncut conversation why light travels slower in glass. He treats light as a wave and describes how the material's electrons produce secondary waves that combine to slow it.这些读者给出的理由,核心是:HN cites it whenever the popular absorb-and-re-emit explanation comes up, as a source for the wave-interference account.讲法不绑某一条新闻,过几年仍然可以当材料看。从2018年到2021年,有1位不同的读者在1个不同月份把它推荐出来,其中明确叫别人去看的有0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refraction of light变成能跟着复述的例子。
视频信息
- 频道
- Sixty Symbols
- 时长
- 16 分 30 秒
- 发布年份
- 2013
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