Can you explain why the colour of the sky passes from blue to orange red skipping altogether the whole range of green frequencies? I have only heard of the legendary 'green, emerald line flash' that appears in particular circumstances Green flashes are enhanced by mirage, which increase refraction... is more likely to be seen in stable, clear ...
Blue light is scattered more than red light, so during the day when we look at parts of the sky that are away from the sun, we see more blue than red. During sunset or sunrise, most of the light from the sun comes towards the earth at a sharp angle, so now the blue light is mostly scattered away, and we see mostly red light.
The net effect is that the red and green cones are stimulated about equally by the light from the sky, while the blue is stimulated more strongly. This combination accounts for the pale sky blue colour. It may not be a coincidence that our vision is adjusted to see the sky as a pure hue.
This doesn't match with our experience of the sky. Given the hand wavy nature of the explanations, I wonder if Rayleigh scattering truly is the explanation for why the sky is blue.
The sky seems to be more uniformly blue than the typical explanation suggests. Further, it follows from the usual explanation that blue light is partially reflected back into the space.
Here, the conventional explanation stops but it seems to me to be incomplete. Here is why: According to the explanation above, the blue light is scattered away from the observer. But then blue light is not reaching the eyes of the observer. Then why should we see the sky as blue?
2 So I understand the basic principles of the scattering of light and how the shorter wavelengths like blue and green are scattered more during sunset sunrise, causing us to see mainly the red light. If this is the case, how come if you look at the opposite side of the sunset to the east, the sky still appears blue?
The sky is actually black. Check that for yourself at midnight. So in the daytime, you are looking at a black sky that is "illuminated" by mostly blue scattered sunlight. The higher your altitude, the dimmer is the blue scattered illumination, so you start to see more of the basic black of the sky. You can test this on your computer display, by going to the color palette and setting it to full ...
The blue color of light of the sky is due to Rayleigh scattering. But the sun itself appears yellow in color whereas the scattered sunlight itself appears blue. Why does this happen? Should the sun
But why does it look so much less blue, when the values of the red and green channels are still smaller than the blue? That is entirely an effect of human perception.
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