Can someone explain dual slit experiment why is it a big thing ?
In: Physics
If you shoot marbles at a double slit and measure where they landed, they only land in two bands, like you would expect. But if you do the same thing with electrons, you don’t see just two bands. You see an [interference pattern](https://cdn.britannica.com/84/284-050-246DA1E0/interference.jpg). This can’t be explained by the electrons interfering with eachother, as the pattern appears even if you shoot the electrons one at a time. The only explanation is that electrons behave like waves.
However, if you put a detector at one of the slits to see exactly which one the electron goes through, you don’t get the interference pattern anymore, but rather the familiar two bands. The only explanation for *this* is that electrons behave like particles.
Combine the two above statements and you reach the conclusion that electrons *must* behave as both particles and waves.
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