This week I couldn’t decide whether to do a landscape or continue the diffraction theme, so I did both! Any time a wave meets an object about the same length as it, it gets diffracted and changes direction, and more objects means more diffraction. So in theory**, if you have a big farm and set your fields up carefully, you can do some serious messing with your neighbours radio reception. That particular example might not seem very helpful, but the same idea is used in all kinds of measurement systems, such as the electron diffraction in crystals from last week.