Saturday, June 18, 2011
(That the sun does not appear green may seem to belie my claim, but this is simply because we humans perceive sunlight as a blend of colors. In fact, sunlight is white - not yellow as artistic renditions had me believing. But it has been pointed out that if the sun really were yellow, then so too would be the clouds.)
It is unsurprising then, that the human eye is most sensitive to green light. After all, it has evolved specifically to take advantage of a green sun.
But it is much more surprising that plants are usually green. I mean, seriously: why are plants green? Some readers might be quick to answer that it's because they contain chlorophyll - a green pigment essential to photosynthesis and thus the survival of most plants. But this is no answer at all, for it merely begs the next logical question: why is chlorophyll green?