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#204 – Cumrun Vafa: String Theory
Lex Fridman Podcast
Is There a String in Physics?
String is a loop of energy, so to speak. There's a tension like the regular string. If you pull it, you have to stretch it. But it's not like a thickness, like a made-of-something. It's just energy. Very tiny. Much smaller than elementary particles of physics. So we basically think from far away, string is like a point particle. And that's why a lot of the things that we learned about point particle physics carries over directly to strings.
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