What is Camera Moiré? #shorts

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[RisingStarOfKorea]

Starting picture is losif Kobzon, was a popular singer and artist in Russia

[musicisthefoodofthesoul]

I always wondered why this happens lol it was annoying while taking a photo of something on tv or any electronic device
Also the huge black lines suddenly scanning, on the camera. I thought it was radio waves or radiation or sth when I was a kid😂 is it moire too idk