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I always just assumed there wasn't much green light, so plants optimised for the rest of the spectrum: The sky is blue, the sun is orangey. Where's all this g
by jonplackett 6y ago
I always just assumed there wasn't much green light, so plants optimised for the rest of the spectrum:
The sky is blue, the sun is orangey.
Where's all this green light I'm missing?
- alanbernstein 6y agoLook at a graph of the spectral power output of the sun, you'll see that it peaks around green.
- sp332 6y agoYour green receptors overlap with red, and also a little with blue. There is no single wavelength of light that only stimulates your green photoreceptors without also setting off red or blue ones. https://en.wikipedia.org/wiki/Color#/media/File:Cones_SMJ2_E.svg https://en.wikipedia.org/wiki/Color#/media/File:Cones_SMJ2_E...
- colanderman 6y agoThe sun is actually green (that is, is approximated by a black body emitter with a peak in the green region of the visual spectrum, see [1]). Its light appears white because that is how we are conditioned evolutionarily. ("True" white -- i.e. equal spectral energy -- appears blue-grey to us.) The sun "looks" orange because when you can look at it (sunrise/sunset), its light is heavily filtered by the atmosphere. [1] https://qph.fs.quoracdn.net/main-qimg-f9bc312e4d114e9e32a62714c36580aa https://qph.fs.quoracdn.net/main-qimg-f9bc312e4d114e9e32a627...
- projektfu 6y agoOrange is red and green. The intensity we perceive is also not the absolute intensity of that part of the spectrum. Neither is the luminosity equivalent to the power (as in energy over time).