- cross-posted to:
- askscience@lemmy.world
- youshouldknow@lemmy.world
- cross-posted to:
- askscience@lemmy.world
- youshouldknow@lemmy.world
The sun is not yellow or orange as we see in books and movies. It emits all the colours in the visible spectrum (also in other spectrums as well) making it white!
White is defined by the color of the sun. Since we evolved within its light we of course see the distribution of wavelengths that make it down to Earth’s surface as white. Even if the sun was always orange, we would see that as white instead.
Do you have a source for that claim? There is no way we can validate that without sending humans to another solar system. And wait thousands of years.
deleted by creator
Surely it is plausible that an organism that evolved vision under particular lighting conditions would develop vision adapated to those lighting conditions.
I’m not telling you it’s not worthwhile to come up with ways to test the claim if you want to be rigorous (e.g. you could measure the wavelength sensitivities of the vision of nocturnal or underwater animals and see if there’s a pattern). But to me it’s pretty self-evident as a starting point at least.
https://midwest.social/comment/3212652
Why do we see it as yellow, then?
Because our atmosphere causes “scattering” of hues in the highest frequencies. This is the same reason the sky appears blue.
Could also be redshift too. I don’t know enough about it to know if we’d notice it over such a short distance and of a constant source, though. Definitely noticeable as reciprocity failure during long exposures in photography.
No, that’s not at all what redshift is.
And neither redshift nor dopplershift would have that much effect on light at the speeds we’re talking about.
Besides the sun’s color on earth it’s not a shift of wavelengths, it’s a subtraction of wavelengths, as you easily can see in a spectrogram.
Do we experience Doppler shift with our own sun? I would assume as we are in a stable orbit we wouldnt