Unfortunately a little bit light on how exactly this works. You have the ground pork and casing, and the pork goes in the casing to become a sausage, but I didn

Unfortunately a little bit light on how exactly this works. You have the ground pork and casing, and the pork goes in the casing to become a sausage, but I didn't see anything about how you get the pork in the casing. Anyway, apparently it's called aperture synthesis. I don't find the Wikipedia article on it helpful either, but this lab designed as a toy experiment for undergrads seems to explain enough for me to be satisfied.[0] Two antennae (I guess you can have more, but simple case here) facing a light source or two. Move them apart and measure the power collected by the antennae. Observe the decline in power for a single source as the distance between the antennae increases, although the shape of that graph depends on the size of the source. For two sources, you see the power collected by your antennae rise and fall with some periodicity as you move the antennae apart; this is caused by the interference of the light between the two sources (I wonder if the single source case has self-interference since it isn't a point source?). Presumably from this you can obtain the amplitudes and phases and Fourier transform to get what the source(s) look(s) like. Exercise left to the reader. Anyway, it is interesting on how many scales interference shows up in physics. Every physics student learns of Michelson-Morley, which was supposed to use the interference of light with itself to measure the difference in distance traveled by light in different directions since light should have been moving at different velocities on Earth as the planet orbits around the Sun... alas, not so, they did not observe the expected interference. LIGO built upon the same principle (from my understanding, at least), the expansion and contraction of space caused by gravitational waves resulting in difference in distance traveled by light, resulting in interference. But you need not restrict yourself to light, as you can probe crystals with electrons and neutrons. The amplitudes of where they scatter depend on what angle you hit the crystal at - hit it at a certain angle, and the possible paths traveled differ by an integer-and-a-half number of wavelengths, and you see nothing. This provides you information about the distance between atoms in the crystalline structure, the angles between them, etc. (I may be oversimplifying here as I hardly remember how this works) [0]: https://vc.bridgew.edu/cgi/viewcontent.cgi?article=1019&context=physics_fac https://vc.bridgew.edu/cgi/viewcontent.cgi?article=1019&cont...