I recently got a starter home learning course on quantum mechanics and well its basically at the stage of explaining the simplistic basics of it.(adsbygoogle = window.adsbygoogle || []).push({});

Now one part of the lecture video mentions that if a photon has two possible pathways it can take. They cancel each other out and there for it takes neither path ? The video failed to explain why it won't pick either given i thought everything was based on probability, therefore it must take at least one of them?

Or the other theory i was told was it takes all of them simultaneously and creates branches in the universe. But if the pathways cancel out - then wouldn't they have to have some kind of energy in the positive and negative to eliminate each other =/

It didn't go into depth on it but i've not heard of this before. I've only heard of the "it takes all possible paths".

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# Multiple pathways

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