Here's the important part of the video, in my opinion: https://www.youtube.com/watch?v=Iuv6hY6zsd0&t=274s https://www.youtube.com/watch?v=Iuv6hY6zsd0&t=274s B

Here's the important part of the video, in my opinion: https://www.youtube.com/watch?v=Iuv6hY6zsd0&t=274s https://www.youtube.com/watch?v=Iuv6hY6zsd0&t=274s Basically, two floating balls are used to create waves on the surface of a pond... From the waves created; from their interference patterns on the surface of the pond, we can see exactly how light behaves in the double-slit experiment.