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
You have 3 types of color sensitive cells in your eye (this is where the red, green and blue primary colors come from). As you already understand light frequency [here’s a diagram to show the frequencies they are sensitive to](https://qph.cf2.quoracdn.net/main-qimg-870ea705b8722d16375ec0f546ea0a37-lq). As you can see there is a lot of overlap.
If you look at where 620nm is it’s triggering the red cone cells twice as much as the green. So if you have a mix of 2 different light frequencies that trigger the red and green cone cells the same as that it will look the same color.
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