In additive colour mixing, a mixture of blue and green lights appears to the normal observer:

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Quizplus · Accepted Answer

In additive color mixing, combining blue and green light produces cyan. This is because additive color mixing involves mixing various colors of light, where the primary colors are red, green, and blue. When green and blue lights are combined, they create cyan, which is a secondary color in the additive color model.

In Additive Colour Mixing, a Mixture of Blue and Green