Linked Questions

208 votes
4 answers

Why are so few foods blue?

Although blue foods exist, they're rare enough compared to other foods for food preparers to use blue plasters as a convention. The natural colour of a given food is due to pigments that have some ...
J.G.'s user avatar
  • 2,524
124 votes
4 answers

Is there a reason why human eyesight and plants make use of the same wavelength of light?

The accepted range for the wavelengths of light that the human eye can detect is roughly between 400nm and 700nm. Is it a co-incidence that these wavelengths are identical to those in the ...
Rory M's user avatar
  • 13.5k
18 votes
2 answers

Are two colors (red + blue) necessary for LED grow lights, or would either color be sufficient?

Below are some chlorophyll absorption spectra from other answers here. There is strong absorption at both the blue/violet end, and the red end of the spectrum, and presumably both of these contribute ...
uhoh's user avatar
  • 5,598
12 votes
1 answer

Why is chlorophyll green? Isn't there a more energetically favorable color? [duplicate]

Chlorophyll being green means it absorbs light in the red and blue area of the spectrum. Isn't this the high and low energy light? Wouldn't plants get more energy if they absorbed light in the green ...
Sarah Toufiq's user avatar
10 votes
3 answers

Why aren't leaves black?

I s'pose this is a variant of the age-old question, "Why are leaves green?" It's fairly easy to ask teh internets and find plenty of answers for that one. I have a different but related question: ...
Armadillo Jim's user avatar
8 votes
1 answer

Was life less colorful before color vision evolved?

According to Wikipedia, we know that color-vision photopigments appeared in the common ancestors of tetrapods and fish at least 360 MY ago. Would life have been less colorful before the evolution of ...
Ian Durkan's user avatar
6 votes
1 answer

The colour of aquatic plants found deep under oceans

I have read that many aquatic plants found in deep oceans are red in colour, however, I do not understand why. As red is the color which gets the least scattered it should be the only light available ...
Reader Manifold's user avatar
6 votes
2 answers

Does the light color spectrum and frequency matter for photosynthesis?

Do plants grow differently when given sun light, wolfram lamp, fluorescent light, LED light, infrared, ultraviolet, x-ray, unfocused laser and stroboscope?
user1306322's user avatar
  • 1,567
6 votes
3 answers

Why does photosynthesis occur even in blue light when the photocentres are activated in red light

From Engelmann's experiment Engelmann used this device to illuminate a strand of Cladophora (not Spirogyra) with light from the visible spectrum, exposing different sections to different ...
user 33690's user avatar
  • 1,955
2 votes
0 answers

Why the plants are not black but green? [duplicate]

if the evolution makes the species better then why the leaf and trees are not black?? black colour absorbs more ligth than simply the green color so a black plant should make photosinthesis better ...
Jose Javier Garcia's user avatar
0 votes
2 answers

what are some examples of how evolution's limitations prevented species from climbing to the absolute highest peak on the fitness scale?

In this answer, the author argued that plants are green instead of red or any other color because of some limitations of the evolutionary process. what are other examples in which the physical and ...
raaaay's user avatar
  • 135