yeah, and clouds are white because the water molecules in them disperse the light evenly, reflecting it all.Communist Hamster said:The sky is blue because bue has the shortest wavelength of all the visible colours, so it penetrates the atmosphere easily. Roses are red because of their pigmentation. Clouds...uh... I'll get back to you on that one.
the visible light scale is not in the middle of the electromagnetic spectrum. plus green light is reflected, not absorbed, like what mr. anonymous said. and none of this would be dependant upon the type of star the sun is.Fraggle Rocker said:Our sun is a type G star. That means that the median frequency of its electromagnetic radiation is green on the visible light scale. Organisms that derive their energy from solar radiation will get the most energy if their receptors are tuned to that frequency. So they evolved chlorophyll-based metabolisms, which are perfectly tuned.