The sky is blue. Photo: Ryo Yoshitake/Unsplash
TECH SPACE — Blue skies are one of the most common and beautiful natural phenomena. However, do you know why the sky is blue?
As quoted from LiveSciencethe answer lies in sunlight and Earth’s atmosphere.
Sunlight consists of all the colors of the rainbow, including red, yellow, green, blue, indigo, and violet.
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When sunlight reaches Earth’s atmosphere, gas and dust molecules in the atmosphere will scatter the light in all directions.
The shorter the wavelength of light, the more likely it is to be scattered by gas and dust molecules.
Blue has a shorter wavelength than other colors, so it is scattered more by the atmosphere.
As a result, the scattered blue light will reach our eyes from all directions, and that is why we see the sky as blue during the day.
At sunset, the sky appears orange or red because sunlight has to pass through more of the atmosphere to reach us.
Blue light is scattered more by the atmosphere, so the remaining colors are orange and red.
This phenomenon is known as Rayleigh scattering. Rayleigh scattering is one of the most common physical phenomena occurring in nature.
Apart from the blue sky, Rayleigh scattering is also responsible for the color of the sky on cloudy days, the color of the sky at sunrise and sunset, and the color of the clouds.
So, now you know why the sky is blue. Hopefully this explanation is useful.
Conclusion
Why the sky is blue is because of sunlight scattered by gas molecules in the Earth’s atmosphere. Sunlight consists of all the colors of the rainbow, but blue is scattered more by gas molecules than any other color. That is why we see the sky as blue during the day.
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2023-09-07 19:01:16
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