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How a mixture of R, G & B single wavelength sources (such as RGB laser) can produce white light even though they do not cover the whole spectrum?

April 26, 2017laser mixture RGB sources

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How a mixture of R, G & B single wavelength sources (such as RGB laser) can produce white light even though they do not cover the whole spectrum?

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Three appropriate lasers are sufficient to stimulate the three types of cone receptors in our visual system to the same degree that they would be by a continuous spectrum. Thus, we are not able to perceive the difference. This property is known as metamerism.