I just watched a video about the Double Slit Experiment which I found amazing. There are a few things I'm not sure about though, so was hoping someone could help.
First of all... is what the video says true? I've read mixed comments saying it's crap and some say it's right. And do we know why an electron acts differently while it's being observed? I think I read once that you can never tell the exact position of one so that's kinda confused me.
The video is here: http://uk.youtube.com/watch?v=FQBYTU4nQuE
Thanks