Can we make black light?

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Solution

No, because black is not an "actual" color or light, but the absence of light. In other words, when you perceive a color it is because there is some electomagentic radiation that is bounced back from the object. Our retinas get exited and interptet that as a color (they interpret different colors in dependence of what frequencies are reflected). But our brain interprets black when there is an absence of light

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