

Thanks!
Based on the phase interaction part of the article, there’s constructive and reconstructive phase interaction going on. That chapter has some nice diagrams about it.
That’s what produces the different colors. The thickness of the layer determines which wavelengths are lucky enough to reflect this way.
Also, here’s what happens with iron oxide.




If you already have a source of income, don’t turn your hobby into a jobby. Hobbies are supposed to be stress free and ejoyable. If you involve money in it, you’re actively undermining the enjoyability of your hobby.
If not, I still don’t think AI stuff is a good source of income in the near future. The AI market seems to be overheating, and expect most of it to come crashing down just like all the other bubbles. If you get involved with AI right now, there’s a good chance you’re going get your fingers burned.