why do pictures of computer screens have those dark lines on them?

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Every time I take a picture of my computer screen with my phone, the screen in the picture has these shadowy vertical lines spaced out on the screen. Why that is?

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3 Answers

Anonymous 0 Comments

Screens have a refresh rate so even though you can’t see it they are constantly refreshing what is on screen so when you take a picture you are seeing it mid-refresh.

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