The mathematical physics of rainbows and glories (2001) [pdf](tlakoba.w3.uvm.edu) |
The mathematical physics of rainbows and glories (2001) [pdf](tlakoba.w3.uvm.edu) |
https://www.atoptics.org.uk/halo/common.htm
https://www.atoptics.org.uk/halo/dogfm.htm
Super old school, love that it's still online.
(edit: incidentally, rainbows and glories fall under the water droplets category)