Square roots are not necessary real though… :p

Yes, of course. Sorry, that was just my OCD peeking through :)

Just to clear it up. The video won’t be lossless, as the DVD is already in a lossy format (mpeg2), but the conversion from DVD to mkv won’t add anything more as it just copies the data without transcoding.

The problem here is that rotation makes only sense for objects that have a size. So you can say “this is the left side” and “now this part rotated to the right”. This concept doesn’t make sense for a particle that is a literal dot. The spin is a characteristics of particles that mathematically behaves like a rotation (freely speaking), therefore we treat it like that. That doesn’t mean it is a rotation.

There is the line between knowing and understanding. Or understanding is based on experienced, mainly your everyday life. And quantum mechanics can’t be represented with everyday life examples. But if you work with it everyday, you gain be experience, which leads to understanding. Is just impossible to share with other people. That’s like asking somebody what the word “existence” means

Facepalm