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Query from: Anonymous, India, 08/16/10
Topic: PHYSICS      Submitted on: AnswerPod.com
Subject: Cause of blue colour of the sky.

Please provide your answer WITHOUT using links or attaching images, docs, etc. (You must still give your source, however).
Attention Council Members: If this query is in the wrong category, be sure to put it in the appropriate category.

Here is the question: Why is sky blue

Rate = 2.5 (Rated by 2 Council Members)
[ This query closed ]
random/grasssky.jpeg
Response from: Vijay Talasila,   
Featured Member on APOnline
Source: This information comes from my own knowledge.
The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.

As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light reaches your eyes. The color of the sky near the horizon appears paler or white.

Rate = 3.5 (Rated by 1 Council Member)

Thank this advisor   
 
Response from: Mary Elisabeth Bens,   
Registered Member on Ammas.com
Source: http://www.sciencemadesimple.com/sk…
The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.

Rate = 3 (Rated by 1 Council Member)

Thank this advisor   
 
Response from: nihir pg,   
Featured Member on Ammas.com
Source: This information comes from my own knowledge.
A clear cloudless daytime sky is blue because molecules in the air scatter blue light from the Sun more than they scatter red light. This scattering effect is known as Rayleigh scattering. Because the blue light is scattered in random directions, some of it reaches the planet surface, where we see it.

When we look towards the Sun at sunset, we see red and orange colors because the blue light has been scattered out (filtered) and away from our line of sight.

In the evening, the sky sometimes looks orange or red because of air pollution. dust, water vapor, and other floating particles in the air act as a filter on the sunlight. When the Sun is low, the air layer is thicker and the light is more filtered, so it looks yellow, orange and finally red.

Rate = 2.5 (Rated by 1 Council Member)

 
Response from: Vasantha Rajan,   
Registered Member on Ammas.com
Source: This information comes from my own knowledge.
Hi,

The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

Much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.

As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light reaches your eyes. The color of the sky near the horizon appears paler or white.

Thank You

Rate = 2.5 (Rated by 1 Council Member)

 
 
 
 
 
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