Why is the sky blue?

Answer 1

Einstein answered this question. It has to do with the way sunlight is scattered by the molecules in the atmosphere. Blue light scatters more than red (Tyndall effect also known as Rayleigh scattering), so more blue light reaches our eye.

There is an excellent description at the website listed below (look at the cartoon and it will be pretty clear).

It is not a reflection from the ocean. And it isn't just water molecules that cause the effect.

Aloha

Answer 2

Sky luminance and colors

The color of the sky is a result of diffuse sky radiation and the fact that air is actually a very transparent blue color[1]. On a sunny day the Earth sky usually looks as a blue gradient — dark in the zenith, light near the horizon (due to Rayleigh scattering). It turns orange and red during sunrise and sunset, and becomes black at night.

Sky luminance distribution models have been recommended by CIE (the International Lighting Commission) for the design of daylighting schemes. Recent developments relate to “all sky models” for modelling sky luminance under weather conditions ranging from clear sky to overcast sky[2].

Answer 3

Sky is blue only in the atmospheric limit due to Rayleigh scattering. When light encounters particles (mainly nitrogen and oxygen) much smaller than its wavelength, the scattered intensity is inversely proportional to the 4'th power of the wavelength. This is called "Rayleigh scattering and it means that half the wavelength is scattered with 2**4 = 16 times more intensity.

But beyond the atmosphere the color of the sky is Black.

Answer 4

The sky is blue because it is mainly made up of nitrogen gas. When light from the sun hits a nitrogen molecule, it get energized or "excited". When the nitrogen molecule becomes less excited, it gives off its energy at only certain energy levels. These energy levels correspond to certain frequencies and certain wavelengths. One of the wavelengths that nitrogen molecules give off after it has become excited is a wavelength that out human eye senses as the color blue. Thus we see the sky as blue.

Answer 5

The suns rays refract of the ozone like a prism and blue being the short wave length in color gets refracted the most.

Answer 6

Because blue light waves are the shortest in the spectrum that we can see. They pass through all the particles in the atmosphere and reach our eyes. The rest of the waves hit particles in the atmosphere and never reach our eyes. Except for at sunset and sun rise.

Answer 7

the sky is not blue but because of atmosphere ozone layer and the sun rays cause it

Answer 8

i can't speak english well but i should tell you that it's because of the sun and the molcules of the air because the sun sines pass them
i just think i'm not sure but
when sunshines pass them they divide the sunshines to different colors but blue is more than the others

Answer 9

because the atomospheric gases become blue when they are hit by the rays of the sun.

Answer 10

Due to the reflection of ocean