Hello
I came across a phenomenon while watching butterfly wing scales. The scales have a structure of a very fine grid.
In small magnifications (about 100X) the image looks like this (attached image). The "stripes" on the scales look like some charge up effect but it is static - it does not change without changing zoom or focus. Zooming in to about 200-300 X causes this effect to completely disappear, the grid structure becomes visible and no charging is present.
I guess it is some kind of interference effect but I am not sure.
Moiré pattern.
https://en.wikipedia.org/wiki/Moir%C3%A9_pattern
https://wavelength.focuscamera.com/what-is-the-moire-effect-in-photography-how-to-avoid-it/
Maciej Trzaskowski It's a simple interference effect akin to thin film colors. Another example is oil film on water. Moire fringes... Can be used to determine the thickness of the film causing the effect.
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