Hey all! So I'm writing a fantasy story about a tidally-locked planet (meaning the sun is always 'in one place above the planet' from the planet's perspective). This would mean the nadir of the sun on the planet would be hottest, there would be a permanently dark side of the planet, and a habitable ring on the 'edge' of the planet...
Anyway– so my question is about the best light suitable for photosynthetic plants. For example, I've read that plant-life farthest from the sun, for example, perhaps just beyond the habitable region (where the sun is about to set/weakest angle of sunlight on earth), would be black-colored to absorb the strongest available light in that place (UV-light). So would this mean (remember its a highly fantastical story...) that plant coloration [alternate chlorophyll] might be white under the sun [if it could bear the heat], to absorb just enough light and ward off heat?...
Hopefully you understand what Im getting at! Basically I'm wondering what [spectrum of] color plant-life would be, best adapted, at each angle incident rays of light hit the earth... from strongest/hottest to darkest/cold (you can just assume a Sun-like star, even though a realistic tidally-locked system probably would be a different class...)