The following is an experiment that shows "spooky action at a distance" of quantum entanglement; that is, when we measure some properties of two entangled photons, we find that measuring property of one of the electrons determines the property of the other:
How, exactly, does this experiment show the entanglement of photons? Please explain it to me in a simple way; I cannot find an answer to this question in Wikipedia or on the whole internet because they contain many complicated words, explaining things in a very difficult way.
what i wanted to know is that why or how does an particle having predefined characteristics violates the law of angular momentum. I have watched this Veritasium/Minutephysics video (http://www.youtube.com/watch?v=ZuvK-od647c) you suggested to me. In particular, what I am trying to figure out is that, how does hidden variable theory is shown to be impossible. what's the reason behind this. explain it in simple word.