Question

why are the sky blue ​

Answer 1

Answer : 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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Answer 2

Answer:

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why are the sky blue

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The sky is blue because the air scatters blue light from the Sun across the sky and down to our eyes.

Nitrogen molecules scatter blue light more than they do the other colors. So a little bit of blue light bounces around in the sky and then enters our eyes. That makes the sky look blue.