this post was submitted on 09 Mar 2024
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If it goes back to just two lines when you look at it, how'd they figure out there's more of them when you're not looking?
Measure, not look. Measure implies interaction. That's why the result changes.
Look at the PBS Spacetime link someone else provided, but in this case the looking is knowing which slot individual electrons or photons go through. Thus, wave pattern when which slot is not known; random scatter pattern when you know which slot.
Look up the double slit experiment. Then consider the characters pov.
It's not just looking. The implication of the person looking is he's looking at which path the light took through the slit. If you measure which slit the particle of light went through, the pattern disappears.