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Aluminum foil (2021)
铝箔薄至10微米，宽达400毫米，长宽比惊人，带你从物理极限看日常材料的工程奇迹。
Article URL: https://dernocua.github.io/notes/aluminum-foil.html Comments URL: https://news.ycombinator.com/item?id=48804297 Points: 192 # Comments: 8…
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Build a Radio Wave Detector With Balls of Aluminum Foil!
用铝箔球自制无线电波探测器，边玩边学电磁波原理，有趣又有料！
Here’s how you can hack together a radio transmitter and receiver out of stuff you have at home—and explore the weirdness of wireless.