29 votes
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Why did Feynman say the double slit experiment "contains the only mystery" of quantum mechanics?

I think what he was getting at is that we don't yet have a single agreed interpretation of what is 'really' happening at a quantum level, and the two-slits experiment typifies the nature of the ...
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9 votes

Why did Feynman say the double slit experiment "contains the only mystery" of quantum mechanics?

The concept of entanglement was introduced by Schrödinger.1 So the idea must have been known to Feynman. However, entanglement is a consequence of a deeper concept associated with the way quantum ...
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6 votes

Why did Feynman say the double slit experiment "contains the only mystery" of quantum mechanics?

I would say there is entanglement involved in the double slit experiment. By entanglement I mean some kind of "spooky action" at a distance, as in the EPR paper, though not necessarily in ...
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2 votes

Why did Feynman say the double slit experiment "contains the only mystery" of quantum mechanics?

I am not sure if this is what Mr Feynman had in mind, but here are some thoughts of mine. The particle interacts with the plate containing the slits, and this interaction results in entanglement ...
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2 votes

Particle like nature of electron in single-slit experiment

An electron beam passing through a single slit does spread out and forms diffraction patterns.
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1 vote
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The double slit experiment from the path integral approach

Let's focus on the path from the source to the slits. Assuming that the particle's speed $v$ is constant, the phase accrued is $\phi = \frac{m v^2 t}{2\hbar} = \frac{p d_0}{2\hbar}$, where we used $d =...
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1 vote

Particle like nature of electron in single-slit experiment

Because the video is wrong, and it's a huge problem on YouTube videos even by reputable people. You need 2 overlapping (sum-of-squares) diffraction patterns (hint: wave) when you have which-way ...
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