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Canada-0-LaboratoriesTesting Κατάλογοι Εταιρεία
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Εταιρικά Νέα :
- visible light - Why is the sky never green? It can be blue or orange . . .
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
- optics - Why does the sky change color? Why is the sky blue during the . . .
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
- Why is the sky not purple? - Physics Stack Exchange
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
- Why is the sky *uniformly* blue? - Physics Stack Exchange
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
- The blue sky — is the simple Rayleigh explanation wrong?
13 The daytime sky appears blue because air molecules scatter Well, this is not actually wrong Molecules do scatter light, each molecule has a particular cross section And this cross section is very small, so the dependence on wave frequency and scattering angle also follows the Rayleigh formula
- Is there more to the the conventional explanation of Why is the sky . . .
An important note: If the Rayleigh formula were accurate (which it is), then the color of visible light most scattered wouldn't be blue, but rather violet, which is of a shorter wavelength We should by all means seeing a purplish sky instead, but it just so happens that our [eyes are more sensitive to blue light than violet] [1] so the blue color predominates in our vision [1
- optics - Intuitive explanation for why blue light is refracted more . . .
Now, this explains why light refracts, but why does blue light refract more than red? The light ray is composed of oscillating electric and magnetic fields So the charges in the atoms are not just moved in one direction and that's it, they are being oscillated because the field itself is oscillating
- Rayleigh equation as explanation for sky being blue
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
- Why is there a blue hour after the golden hour?
17 There's a great story about why the sky is blue during the day, and turns golden during sunsets: Rayleigh scattering affects blue light more During the day, blue light from the Sun is scattered towards us from all directions, causing a blue sky
- Why is the colour of sunlight yellow? - Physics Stack Exchange
During day, it scatters violet and blue colors leaving yellowish sunlight (the reason why sky is blue and sunlight is yellow) During morning and evening, the sun appears reddish because light rays needs to travel longer distance in atmosphere which causes scattering of yellow light too
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