When the sun light reaches the Earths atomsphere it is scattered or deflected,by the tiny molecules of gas (mostly nitrogen and oxygen)in the air.Because these molecules are much smaller than the wavelength of visible light the amount of scattering depends on the wavelength.
What causes the sky to be blue?
Blue light is scattered in all directions by the tiny molecules of air in Earth's atomsphere.Blue is scattered more than other colours because it travels as shorter smaller waves.This is why we see a blue sky most of the time.Also the surface of Earth has reflected and scattered the light.
Thank you Chloe
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