3blue1brownWhat is the relationship between curvature radius in mathematics and curvature radius in physics?
Initially, I was confused about the different description of curvature radius, but now it is totally resolved. This video talks about these two definitions and digs out the exact relationship between them.
(Because of my bad English, there might have a lot of language mistakes, one of which is '密切圆', osculating circle, translated incorrectly as 'close circle'. Hope you can forgive me of it.)
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4.1
It's a very clear video, but it is lacking the "spark" of motivation I've come to expect from SoME entries.
2.6
Language barrier. Unfortunately, reading subtitles during a math explanation is not very friendly.
5.5
You should make this video into an article, it's more easily sharable and I feel like it would translate well into writing.
7.4
This video is very well motivated, references formulas but does not rely on them, instead using visuals to demonstrate the meaning of curvature.
4.8
Although I didn't really get anything new from this, it's nice to see the topic being covered in a very condensed manner.