Consciousness

What there is no purple! Yup there is no P in ROYGBIV. But wait, what about violet? Well, despite what you may have come to believe, violet is not purple. In fact, violet (along with the rest of the colors in a naturally occurring rainbow) has something purple doesn’t—its own wavelength of light. Even though you can’t see those wavelengths (more on that later). Red, orange, yellow, green, blue, and indigo are all just as real. But purple? Well, purple is just your brain’s way of resolving confusion. That’s right. Red and blue (or violet) wavelengths are two opposite extremes on the spectrum. When you see both of these wavelengths in the same place, you eyes and brain don’t know what to do with them, so they compensate, and the clashing wavelengths register as the color we call purple. Which doesn’t actually exist. (Source: Popular Mechanics)