why is the sky blue?

Answer 1

Asked and answered about a million times on Y!A.

It is because of the differential scattering of the sun's light by the atmosphere. The red end of the spectrum is absorbed. The blue end is scattered.

Answer 2

The sky is the part of the atmosphere or of outer space visible from the surface of any astronomical object. It is difficult to define precisely for several reasons. During daylight the sky of Earth has the appearance of a deep blue surface, but this is the result of the air scattering sunlight. [1] The sky is sometimes defined as the denser gaseous zone of a planet's atmosphere. At night the sky has the appearance of a black surface or region scattered with stars.

During the day the sun can be seen in the sky, unless covered by clouds. In the night sky (and to some extent during the day) the moon, planets and stars are visible in the sky. Some of the natural phenomena seen in the sky are clouds, rainbows, and aurorae. Lightning and precipitation can also be seen in the sky during storms. On Earth, birds, insects, aircraft, and kites are often considered to fly in the sky. As a result of human activities, smog during the day and light radiance during the night are often seen above large cities (see also light pollution).

In the field of astronomy, the sky is also called the celestial sphere. This is an imaginary dome where the sun, stars, planets, and the moon are seen to be travelling. The celestial sphere is divided into regions called constellations.

Answer 3

Traditionally colored sky Nile dark orange or red in the sunset time, but we tend to believe that the natural color of the sky is blue. As the sun light source on the ground, issued a white light is really surprising that the always thought that the color of the sky is blue. White consists of a mix seven colors (Red, Orange, Yellow, Green, Blue Nile, and violet, as it appears at Rainbow), which produces different lengths of components of the light rays. The color television, resulting article also sunlight is different lengths. Some of the material is characterized by its ability to absorb light or notoriety or defeat in all directions. (Except totally transparent rule will allow the passage of light, as well as the impact of vision in humans. Article red example, if exposed to the light absorbing all colors except red, reflected. The article reflects some light and some Blue Cross. The article germinating all black and white colors Yakeshem all. when the light beam passes through the air, the defeat will inevitably be a certain degree dependent on the quantity of dust found around it. shortwave and thinking of colors (blue) more than the long-wave (red). In the days of net where dust and a few drops of water in the atmosphere will be reflected light rays very limited, thus we see the sky blue chapeau. at dusk, and where is the quantity of dust in the air, especially the day of harvest, increasing light scattering, especially shortwave blue, so keep the yellow and red rays phenomenon on the surface of the Earth. if I land Kalghemer, without an atmosphere surrounded by, the sky looked black always, in day and night.

Answer 4

Essentially because the shorter wave length light (blue) bounces around off of the gas molecules. The longer wavelengths (red, orange, etc) pass right through. This is known as Rayleigh scattering. See the link for a detailed source.

Answer 5

rayleigh scattering

Answer 6

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