Does this look white to you?

When you mix red and green, what do you get? White light is all of the colors, right? So, how do computer screens show you every wavelength of light? Or do they?

Only some humans can see this type of light https://www.youtube.com/watch?v=CSu0cV3fqi8
Singing this Note is IMPOSSIBLE! https://www.youtube.com/watch?v=F64xcPKKES8

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S01E32 - AMAZING! Ferrofluid + Glow Sticks