.................with apologies to Alistair Cook

Tuesday, 5 August 2008

An explanation...

...of why (PS - I did read a very good analogy of why entanglement doesn't break causality. Imagine you're two light years away from your friend Bernie, Exactly halfway between you is Charles, who has two balls - one black, one white -- and two light-speed spacecraft that can travel exactly at c. Charles puts one ball in one spacecraft, one in the other. He sends one spacecraft to Bernie, and one to you. A year after he does this, you receive your spacecraft, Bernie his. The instant you look at your ball, you'll know what colour Bernie has - despite the fact that you're two light years apart and only a year has passed since the balls were assigned. It looks like information has passed at twice the speed of light - but nothing has gone faster than c. Einstein is happy, even if Bernie probably thought it a wasted year. )

This courtesy of the estimable Rupert Goodwins...