If orange has a frequency in the visible spectrum that is 620nm, how does light that is 2/3 red at 750nm and 1/3 green at 570nm also make orange?
In: Physics
We have cells in our eyes that react to different frequencies of light, red, green, and blue. The thing is they are not perfect so they not only react to 750nm or 570nm, it’s more a range and it overlaps, orange light excites both the red and green cells a bit at the same time, so if you use pure red and pure green you can excite those cells at the same level that orange light does.
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