STEP 06

I colori nella scienza - Indicare come il colore assegnato è entrato nella storia della scienza. Si suggerisce di investigare i trattati di fisica

Like i said in the previous posts, the colour Turquoise cames from a mix of blue and green, so i can start to analise the first aperance of blue in the science world. That's related to the big question: "Why the sky is blue?"
The answer:
"The sky is blue not because the atmosphere absorbs the other colors, but because the atmosphere tends to scatter shorter wavelength (blue) light to a greater extent than longer wavelength (red) light. Blue light from the sun is scattered every which way, much more so than the other colors, so when you look up at the daytime sky you see blue no matter where you look. This scattering is called 'Rayleigh scattering'; the amount of scattering goes as the frequency of the light to the 4th power."


The dark side of the moon is Turquoise, say astronomers

In a demonstration of the power of science to ruin a perfectly respectable work of art, researchers have discovered the colour of the dark side of the moon.
Measurements from a telescope in Hawaii mean that pedants may now argue that, technically speaking, if one wanted to be entirely accurate, the side of the moon referred to in Pink Floyd's 1973 album The Dark Side of the Moon should really be described as "turquoise".
The revelation comes from two years of measurements by an international team of astronomers who installed a telescope and a sensitive camera at the Mauna Loa Observatory in Hawaii, run by the US National Oceanic and Atmospheric Administration.

"Astronauts standing on the moon and looking up at the Earth described it as a blue marble," said Thejll. "Having not been into space myself, I don't know what they meant exactly, but once that blue light strikes the moon's surface, it shifts to a blue-green colour. We can call it turquoise."

Font:
https://www.scientificamerican.com/article/why-does-the-ocean-appear/
https://www.theguardian.com/science/2014/jan/10/dark-side-moon-turquoise-astronomers