Probably not well worded (bad at Physics!)
In: Physics
Let’s just get one thing out of the way, the Many World hypothesis is just one of many interpretations of quantum mechanics.
The double slit experiment is actually that important to this. It just shows that light (and also particles) behaves like a wave. There’s nothing mysterious about the interference patterns, waves make those in classical physics. Water waves make them.
What DOES play into Many Worlds is actually the opposite, the part where the wave behaves like a particle. For example, hitting the screen in a precise spot as if it had taken a very specific path after having already interfered all over place like a wave.
When the fuzzy cloud of “is it here, or is it there, it’s all possible” suddenly interacts in one specific point in space at a precise moment (like a particle) despite it hypothetically, according to the physics governing it, being able to happen at a range of other times and positions, that’s when the Many Worlds people go “actually, it all DID happen, in alternate universes”.
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