The sky is blue as a result of Rayleigh scattering. Rayleigh scattering represents the high frequency of gas molecules hitting and absorbing blue light. As the horizon turns pale, the blue light has to pass through more air to reach the human eye, which causes the horizon to appear white.
Longer-wavelength light passes through the atmosphere easily. Colors like red, yellow and orange are not affected by the air as much, and the frequency of absorbed light is low. Shorter-wavelength light is scattered by gas, sending it in different directions. The scattered blue light is seen by the human eye as coming from every direction.Learn More
The southern lights, or the "aurora australis," are diffuse sheets of lights in the sky of the southern hemisphere. The aurora australis are the southern hemisphere’s counterpart to the northern lights, or aurora borealis, in the northern hemisphere.Full Answer >
There are many proximate causes for changes to the color of the sky, but they all involve the way light is diffracted through the air. Light from the sun can be bent as it moves through the Earth's atmosphere, and the wavelengths of light that are able to pass most easily through the air give the sky its color.Full Answer >
The Earth's atmosphere is primarily made up of nitrogen, oxygen and argon, but it includes trace gases in smaller amounts such as neon, helium, carbon dioxide, methane, nitrous oxide and ozone. The most abundant gases in the atmosphere are nitrogen at 78 percent and oxygen at 21 percent, while the trace gases methane, neon and helium make up around one-tenth of 1 percent of the atmosphere.Full Answer >
According to the University of California in Santa Barbara, all weather occurs in the troposphere. It is the lowest level of the Earth’s atmosphere, and it is bonded on the top by a layer of air called the tropopause.Full Answer >