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Cringe1God t1_j5uko5g wrote

This feels like a dumb question but how do TVs make yellow light? Since yellow is a primary color and can't be made by any other colors.

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javanator999 t1_j5uzlnj wrote

Yellow is a primary color in the subtractive system. This is the ones that paint and printing use where the ink or paint subtracts some of the white light. TVs and monitors used the additive system where the three primary colors are Red, Green and Blue. You mix Red and Green to get yellow.

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ExtraStrengthPlaceb0 t1_j5uz5lf wrote

The other commenter is correct that R+G = Y when it comes to TV and light in general.

Yellow is only a primary color when it comes to painting (which reflects / absorbs different wavelengths of light). The primary colors of light themselves are red, blue, and green.

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IronSoviet t1_j5ulkr0 wrote

RGB pixels light up the the red and the green to make yellow.

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