august utc this is an oooold subject section here but i agree the highly detailed diagram is quite scary looking 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 multislit with vectors file wave diffraction lambda slit png 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 barrier slit were actually visible clearly rather than just another thin black line in a parallel field of black lines consider either file difraction png or file difrakce sterbina bodova png somewhat related seems like there is no navbox for the wave phenomena 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 through among them