Intro to diffraction pt 5 Peak Intensities

[@palamalama]

Thank you for going into structure factors, really helpful! You were a big help :D

[@sepidememarbashi9101]

Thank you for the very clear explanation :)

[@yen-linhuang888]

thanks for sharing. one question: at 22:50, why the extra plane can scatter x-ray even without an atom (the highlighted spot)?