Always these weird lines
In: Technology
Its a mathematical principal called “[Moiré](https://en.wikipedia.org/wiki/Moir%C3%A9_pattern)”
When 2 grids have different cell size (or one is closer to an observer than the other), or are rotated, the dark parts of the grid overlap creating an extra dark spot.
Both screens and Camera’s use grids of pixels, since its almost impossible for these grids to be lined up with each other you get that effect any time you take a picture of a screen. Its basically impossible to get rid of, there are ways to reduce it (like making the space between pixels thinner, or increasing the resolution) but it will always be there.
Our eyes dont have this problem because the photo receptors in them are not arranged in a grid at all, just organically placed around (and our brain does an amazing amount of preprocessing our vision field (this is what your vision actually looks like https://xkcd.com/1080/)).
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