I heard that the violet in rainbow is only created because the bottom blue coincides with another inner rainbow’s top red. I forgot where I heard it but it sounds logical.
Whenever I see the EM spectrum, it always goes from red to green to blue then to VIOLET which I don’t know how it got there. What bothers me more is how there’s an infraRED and then it goes ultraVIOLET.
I remember in preschool that red + blue = violet so where did the red from the violet part of the spectrum comes from?
In: Physics
Violet is at the edge of the spectrum, with a wavelength of 380-450 nm.
Infrared and ultraviolet are just past opposite edges of the visible spectrum. Infrared means “below red” while ultraviolet means “beyond violet”. It doesn’t go from infrared to ultraviolet.
Mixing red and blue results in a similar color because of the way our eyes work. We can’t actually “see” every color – our eyes have 3 types of “color detecting cells” (i.e. cone cells), each is most sensitive to a specific range of wavelengths, so whatever color we can see is a combination of how sensitive each of these cell types to the specific color. In the brain, a combination of red and blue creates a color which is similar to the one created when you see violet.
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