Huh! I’d read about the belt trick, but never actually tried it. It works! It’s magical! Or at least highly surprising. Also quantum and stuff. https://en.m.wikipedia.org/wiki/Plate_trick …pic.twitter.com/iLVZ65s8B9
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Huh! I’d read about the belt trick, but never actually tried it. It works! It’s magical! Or at least highly surprising. Also quantum and stuff. https://en.m.wikipedia.org/wiki/Plate_trick …pic.twitter.com/iLVZ65s8B9
The trick illustrates the fact that, although usually rotating something 360 degrees brings it back to the starting point, in other cases you have to do 720 degrees.
Apparently electrons do this. #Idontknowanyphysics
Yup! I was motivated by @EricRWeinstein mentioning spinors today, and I thought “hmm, I vaguely remember those are sort of like tensors but for electron spin; I should have a lay understanding of them,” so I read the Wikipedia article. It’s pretty good! https://en.wikipedia.org/wiki/Spinor
There is indeed a close relationship with quaternions:pic.twitter.com/T9QTNGFOEq
Although apparently you are not supposed to understand them. I’m not sure why. It’s just algebra. Maybe it’s the relationship to physics that’s mysterious. #Idontknowanyphysicspic.twitter.com/D33mJTWeH7
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