General Knowledge - Basic General Knowledge - Discussion


The clear sky looks blue because

[A]. reflection of light
[B]. refraction of light
[C]. diffraction of light
[D]. dispersion of light

Answer: Option D


No answer description available for this question.

Anusha said: (Oct 2, 2010)  
Why please describe with example?

Sundar said: (Oct 2, 2010)  

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.

Yogeesh Kotian said: (Aug 29, 2014)  
What do you mean by dispersion?

Kanha said: (Aug 10, 2015)  
Sky is seeing blue because the dispersion of light due to the water of sea.

Rushi said: (Oct 16, 2016)  
The water is colorless and also odourless.

Thejasri said: (Feb 22, 2017)  
I am collapsed with the answer.

Dispersion of light because in some other websites the answer is scattering of light please say which one is correct.

Jps said: (Sep 30, 2018)  
Scattering is the right answer.

But here dispersion may be chosen as no option for scattering.

Ram said: (Apr 25, 2019)  
Scattering of light is the right answer.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.