d=lambda/2n.sin(a)
I’m so close to making rainbows come out of my nose. Right now I can manage little diffraction halos and that’s about it, but I’m pretty convinced that a rigorous training regime will result in technicolored success.
I’m serious. About the halos, not the training. I never noticed it until last night, crunching through lots of salt and a little snow, wandering back from work. The temperature has been loitering below zero (in real units) for at least a week, so my breath pours out in great wafts of drifting fog. The way to entice out the halos is by adjusting your breathing so that the clouds cross between you and a streetlight. As the vapor rises across your vision, a halo sympathetically flashes in front of the orange glow of the lamp.
It’s fascinating. At least, it’s fascinating enough to eat up all my attention when walking back in the cold, in the dark, by myself. Sniff sniff.