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

the atmosphere refracts light rays fr the sun, making the sky look blue in the afternoon.(in the same way, a pencil in a cup of water is always 'bent') also, as the sun rises or sets, the angle of the sunlight changes. this light will then be deflected differently (compared to noon time), so u get a different sky colour.

when u r on the moon, the sky will always appear dark in day n night as it does not have an atmosphere.

Answer 3

this is from wikipedia, i want to re-explain but i think this is enough..read through..

The sky is blue partly because air scatters short-wavelength light in preference to longer wavelengths. Combined, these effects scatter (bend away in all directions) some short, blue light waves while allowing almost all longer, red light waves to pass straight through. When we look toward a part of the sky not near the sun, the blue color we see is blue light waves scattered down toward us from the white sunlight passing through the air overhead. Near sunrise and sunset, most of the light we see comes in nearly tangent to the Earth's surface, so that the light's path through the atmosphere is so long that much of the blue and even yellow light is scattered out, leaving the sun rays and the clouds it illuminates red.

Scattering and absorption are major causes of the attenuation of radiation by the atmosphere. Scattering varies as a function of the ratio of the particle diameter to the wavelength of the radiation. When this ratio is less than about one-tenth, Rayleigh scattering occurs in which the scattering coefficient varies inversely as the fourth power of the wavelength. At larger values of the ratio of particle diameter to wavelength, the scattering varies in a complex fashion described, for spherical particles, by the Mie theory; at a ratio of the order of 10, the laws of geometric optics begin to apply.

Answer 4

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

Answer 5

The sky is blue due to light scattering.

Light scatters when it passes through particles that have a diameter one-tenth that of the wavelength (color) of the light. Sunlight is made up of all different colors of light, but because of the elements in the atmosphere the color blue is scattered much more efficiently than the other colors.

The blueness you see everywhere else is all of the atoms in the atmosphere scattering blue light toward you.

Answer 6

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light.

Answer 7

Because that is the color that your eyes recieve the wave length of the white light of sun light that passes through our atmosphere of predominantly oxygen. It is how the light waves are absorbed and refracted that affect the colors we see in the sky according to what I understand.
Or you can say God in all God's wisdom made it blue because we percieve blue as a relaxing color such that looking at clouds and floating in a blue sky would relax us. If you get technical that color is actually the color that is not absorbed such that it is reflected off and the sky is actually the opposite color we are seeing what is not absorbed. This point has always confused me to some lesser extent. E.g. black is the presence of all color such that it absorbs all color of light. This is easier for me to understand because a black interior of a black car is much hotter than one of other colors. I owned one of those was sizzling. And white is the absence of color such that we see them all and that is white to our retinas or as with the sun the emission of all colors. What does it really matter because in general I think it is beautiful to look at when I take the time.

Answer 8

the sky is blue because the light bounces back the color blue. The sky absorbs all the colors except blue then the sky reflects the color blue..

Answer 9

Rayleigh scattering (named after Lord Rayleigh) is the scattering of light, or other electromagnetic radiation, by particles much smaller than the wavelength of the light. It occurs when light travels in transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering of sunlight by the atmosphere is the main reason light from the sky is blue.

Answer 10

The sky is a reflection of the deep oceans of the earth