Maybe they're referring to double-slit diffraction? It could be split by the slits then combined again because of constructive and destructive interference. I still don't know how to explain the intensity though... maybe a Physics guru could?
Maybe they're referring to double-slit diffraction? It could be split by the slits then combined again because of constructive and destructive interference. I still don't know how to explain the intensity though... maybe a Physics guru could?