Why the sky appears blue on a clear sky
Answers
In band of 7 colours, red had wavelength and least. But blue is the colour of average wavelength.
In splitting of light, also called Tyndall Effect, the colour of least wavelength split most.
When small particles in air like nitrogen and oxygen molecules come infront of light then they split light colours in different directions.
In Tyndall Effect, the violate colours scatters in such fast rate that it's presence can't be seen. Same for other colours with shorter wavelength.
Inversely, red colour doesn't scatter due to which other colours of high wavelength too can't be seen in day.
Out of spectrum, only Blue colour is at such average wavelength that it scatters and remain in sky for long due to which we see sky blue.
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ANSWER :
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Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
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