The colors of peacocks and hummingbirds are the result not of pigments but of ridges in the surface layers of their feather. By what physical principle do these ridges produce colors?The colors of peacocks and hummingbirds are the result not of pigments but of ridges in the surface layers of?
I believe you're looking for interference, however, the colors produced by the birds is not solely interference, but a mixture of both pigmentation and interference (the interference gives the visual effect of the color change).
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