How Special Relativity Makes Magnets Work
Veritasium · 7 則 HN 推薦
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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.
HN 推薦的原因： HN commenters recommend it as a short, clear explanation of why moving charges create magnetic fields.
“if you are curious why a moving charge creates a magnetic field watch this Veritasium video” 閱讀 HN 討論 ↗