when you take a photo of a tv screen, why do you get those weird lines that change when you zoom in and out?
In: Technology
https://xkcd.com/1814/
It’s called a Moiré pattern. It’s when two grids (the grid of pixels in the camera and the grid of pixels on the tv screen) don’t quite line up.
https://en.wikipedia.org/wiki/Moir%C3%A9_pattern
The camera is trying to focus on each pixel on the screen but can’t successfully do it because the pixels are so small or too far away. Something like that, I don’t know what it’s called though.
I don’t mean the pixel grid
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