Popular Science/I'm wondering
It's said that one of the primary reasons why blue light is seen part of the morning & most of the day is because the Elector-magnetic color spectrum (ECS) is the "shortest" wave length of the ECS; yellow, red & sometimes violet, on the other-hand, are seen during dawn & dusk. What exactly does that mean? Way does the length of the light wave determine what color of light is shown in the sky? Furthermore, why isn't green light almost never seen in the sky? hope u can help
The sky is blue because of Raleigh scattering, see
All light is just photons, massless "particles" at different wavelengths and frequencies.
The entire electromagnetic spectrum from shortest wavelength to longest wavelength is as follows:
Gamma rays, X-rays, ultraviolet, visible light (what you call the color spectrum), infrared
(fancy name for heat), and radio (includes TV, FM, AM, shortwave radio, and microwaves). Some think that gravity waves should be included below the radio spectrum, but we just don't know as yet.
The only difference between an infrared photon and a gamma ray photon is it's wavelength.
Also, all photons exhibit both a particle and a wave property at the same time... I know this is hard to visualize, but take my word for it, it's true.
Now to color in the visible light part of the electromagnetic spectrum, which is actually a very small region of the entire electromagnetic spectrum. All colors are just the way our retina and brain interpret different wavelengths of light, ranging from the longer wavelengths like red, down to the shorter wavelengths of blue and violet. Now you can have emitted light (like the sun) and you can have reflected light, like your green shirt or the moon.
Emitted light generally (except for monochromatic laser light) is composed of all wavelengths which the human eye interprets as white light. (The color black is simply the absence of all light). The sunlight, composed of all wavelengths, strikes the Earth's atmosphere, and most of the other wavelengths (except for blue) are absorbed and scattered. Thus we see the sky as a blue color.
Now as for reflected light, your green shirt (or the dyes in it) absorb all wavelength colors EXCEPT for green... thus our eye interprets your shirt as reflecting the green wavelength. And this is true for all reflected light. If an object absorbs no light and reflects it all, we see it as white... if it absorbs all wavelengths, then we perceive it as a black shirt.
And that's how it all works. All wavelengths are being absorbed, and the one reflected is the color you perceive with your human eyes.
Oh, sky color - when storms are present, color can be seen also. A "green colored" sky is sometimes prominent when there is a tornado in the area... grass, pollen, leaves, and weeds are tossed into the sky and observer can observe a green colored sky. Also rain can be red or reddish orange if a violent thunderstorm comes in off sandy desert regions, the color coming from the iron in the fine sand particles can cause a reddish-orange. In Siberia, blue and green colored snow can fall from pollen stirred up in the air. So various particulate matter can and does color rain and winds and even snow, under semi-rare occasions.
Hope this helps,