, 27 August 2010 (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 4Lambda 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.   20:14