hao,
Define color: ...?
The color is visual perception nerve signals generated by the photoreceptors in the retina of the eye sends to the brain uptake of certain wavelengths of the electromagnetic spectrum.
Uff, stayed no concept. xD Well the question is, what are the colors that are defined as primary: ...? Aja, Yellow, Blue and Red, the same are the ones who are not, hehe. There are 2 groups of primary colors:


Ok. Consider an apple "red." When viewed under white light looks red. But this does not mean that emits red light, which would be the case an additive synthesis. Doing so would be able to see in the dark. Instead, it absorbs some of the wavelengths that make up white light, reflecting only those humans see as red. Humans are the red apple because of the particular operation of your eye and brain interpretation of the information that reaches the eye.
Curious?
May the force be with you! ;)
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