Scientists say why blue is rare in nature

(ORDO NEWS) — In nature, it is extremely rare to find a bright blue color. Only 10% of all colors known to science can have this shade. If we talk about birds, then their wings must have a certain nanostructure of wings in order for the feathers to be blue.

It is reported by Live Science.

In the retina of the human eye, there are almost 7 million very sensitive cells that can recognize different colors and shades. Scientists call them cones. They are able to distinguish three primary colors – red, blue and green. Information about a particular color enters the brain, where it is converted into other shades.

Kai Kupferschmidt talked about how the eyes absorb some of the white, and reflect everything else. It is this reflected part that has the color. If a person sees blue, it means that the retina has absorbed the red part of the spectrum.

Red differs from the rest in that it has a longer wavelength. To convert it to blue, you need special molecules that can absorb the minimum amount of energy.

Among animals, blue is extremely rare due to the fact that not a specific pigment is needed, but the structure of the integument itself. For example, some butterflies have such a wing structure in which all shades are extinguished and only blue remains. A similar effect occurs in some species of birds, as well as in blue-ringed octopuses. In the latter, bright blue rings warn of their danger, because they contain poison.


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