this post was submitted on 03 Aug 2025
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I guess I've always been confused by the Many Worlds Interpretation of Quantum Physics and the fact that it's taken seriously. Like is there any proof at all that universes outside of our own exist?

I admit that I might be dumb, but, how does one look at atoms and say "My God! There must be many worlds than just our one?"

I just never understood how Many Worlds Interpretation was valid, with my, admittedly limited understanding, it just seemed to be a wild guess no more strange than a lot things we consider too outlandish to humor.

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Per rule 9, could you provide a source for your interpretation of the double slit experiment, specifically that “there is no sort of wave collapse” and “the photons absorbed by film or eyes were just not impacting the surface because they were absorbed elsewhere, causing less friction between the photons and changing the patterns on the surface.”?

This appears contradictory to the standard quantum mechanical explanation for the interference pattern, which is that the wavefunction of the photons passes through both slits, interfering with itself and changing the probability of detection or interaction at specific points along the film/sensor.

The effect isn’t unique to photons and has been observed with electrons, atoms, and even large molecules. As long as the slit size and spacing are comparable to the wavelength of the particle wavefunction it’ll work.

The photon wavefunction being a superposition of position states that self-interact, and then collapse into a single state/location when interacting with a non-quantum object are fundamental to quantum mechanics, and are part of the reason this experiment is such a great introduction to QM. The many worlds interpretation of wavefunction collapse is not fundamental- it’s one of many interpretations for what the math of QM means and not even the most popular amongst theorists (that’d be the Copenhagen Interpretation).