Feynman experiment with bullets

[Z3kr0m]

Hello, I have a question. In Feynman lectures vol. I, in chapter 37-2, Feynman has an experiment with bullets.

*Copyright http://www.feynmanlectures.caltech.edu/III_01.html
But the curve for $P_{12}$ looks in the picture is different from his live recorded lectures.

*YouTube -

Is the difference because of the first hole (in video) right after bullet source? If it's that close to source it should shoot bullets to all sides like in the book, or not? Thanks for answers.

 

[Khashishi]

It looks different because it is just a sloppy illustration. The point is that there is no interference pattern. We don't really care if there is one maximum in the middle or two maxima on either side. In either case, it is just an example of no interference. I can't say if the diagram in the book is sloppy, or if the diagram in the lecture is sloppy, because it is just a hypothetical situation with no hard numbers.