How Special Relativity Makes Magnets Work
推荐理由
if you are curious why a moving charge creates a magnetic field watch this Veritasium video
说明
这是2013年由Veritasium发布的一部讲解,主题归在Fundamental physics。它讲的是relativity and magnetism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:Veritasium explains magnetism as a consequence of special relativity. Length contraction of moving charges makes a current in a wire attract or repel a nearby moving charge.这些读者给出的理由,核心是:HN commenters recommend it as a short, clear explanation of why moving charges create magnetic fields.讲法不绑某一条新闻,过几年仍然可以当材料看。从2014年到2024年,有7位不同的读者在7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relativity and magnetism变成能跟着复述的例子。
视频信息
- 频道
- Veritasium
- 时长
- 4 分 19 秒
- 发布年份
- 2013
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