And so the blog finally drags on to the point where I have to start talking quantum again. Quantum mechanics is a hell of a thing; it’s both complex and hugely counterintuitive, and it isn’t helped by many of the popular misconceptions about it such as Schrodinger’s cat. I originally wanted to explain how quantum entanglement and the quantum eraser works because it’s one of the most head-screwy bits of physics out there, but then I realised there’s a lot of basic physics knowledge required to understand that that I can’t just take for granted. In particular you really have to know about wave-particle duality and the double slit experiment.