if the space is black in colour then why we see the sky blue? if our atmosphere layer is having blue colour?

Dear Student

The space appears black because it is of infinite size not having any particular body that can illuminate it completely. The bodies that illuminate the sky are the stars and planets that have hot gaseous properties. As of  our atmosphere, it appears blue is because of the phenomenon called refraction. The sunlight that reaches earth, is made up of a bandwith of seven colours VIBGYOR. Violet light gets dispersed the most hence when sun light enters the atmosphere of earth, the violet band of the spectrum scatters and makes the sky seem as blue. 

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Space is in black colour because as it is too big and Sun is smaller than it so I coud't light whole the universe that's why it's dark, and our Earth is blue because of it's weather conditions. 

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As space is too big and their is no light so it's dark and we sky blue because of our weather conditions. 

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