August  UTC This is an oooold subjectsection here but I agree the highly detailed diagram is quite scarylooking to a novice reader and much more complicated than the basics of the topic Start with something simpler since there are certainly simpler aspects of diffraction than multislitwithvectors FileWave Diffraction Lambda Slitpng would certainly be an improvement simpler case still a pretty picture that clearly illustrates some key ideas I think that diagram would be even better if the barrierslit were actually visible clearly rather than just another thin black line in a parallel field of black lines consider either FileDifractionpng or FileDifrakce sterbina bodovapng Somewhat related seems like there is no navbox for the wavephenomena articles Having a directory of the reflection refraction diffraction interferences etc main articles would be a great way to tie together all these pages and help students work throughamong them