[hardmath123]

If you liked this, you might enjoy this little trick you can do with moiré patterns -- near the end of the post, I talk a little bit about the math behind the FFT connection. https://hardmath123.github.io/moire.html

[dongping]

Or for those who studied electrical engineering (or anyone one who took a Signal and System course):

https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampli...

https://matthews.sites.wfu.edu/misc/DigPhotog/alias/