FlexiLingo
Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Uploaded 05-10-21 What happens if you cut a bar magnetic in half? We get two magnets, each with their own North and South poles. But what happens if you keep on cutting, into fourths and eighths and sixteenths and so on? Will we ever get to a single pole? I’ll spoil the answer for you: we don’t know! But the idea of magnetic monopoles remains one of physics’ most tantalizing maybes. Check out th...
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B1 · 中级
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Physicists have been hunting for one particle longer than perhaps any other.
, .
And of all the fantastical beasts of particle physics, this is perhaps the most likely to
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B1 · 中级
能听懂简单新闻就可以
- 87% 的单词在 B1 或更简单的水平。
- 每分钟 122 词：语速慢，清晰。
- 整集共有 140 个较难的单词（B2 及以上）。
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较难的单词（B2+）
Physicists have been hunting for one particle longer than perhaps any other. It's not the tachyon or some supersymmetric particle, it's the magnetic monopole. And of all the fantastical beasts of particle physics, this is perhaps the most likely to actually exist.
So where are they all? Let's try an experiment. Take a metal bar and force all the electrons to one end. The electric field of the bar now looks like this.
That's a dipole field. Now cut the bar in half and you get a pair of electric charges, one negative and one positive, both of which have electric fields that radiate straight out. Now take a metal bar and instead magnetize it.
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