The Science of Why the Sky Appears Blue: Rayleigh Scattering Explained
By
udit99
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Summary
This article explores the scientific explanation for why the sky appears blue, examining the physics of light scattering in Earth's atmosphere. It discusses how sunlight interacts with atmospheric molecules, particularly through Rayleigh scattering, which causes shorter blue wavelengths to scatter more than longer red wavelengths. The article explains that the sky's blue color results from this selective scattering, and addresses related questions about why the sky isn't violet (due to human eye sensitivity) and why sunsets appear red (as light travels through more atmosphere).
Key quotes
· 5 pulledThe color of anything is due to the wavelength of photons coming from that thing and hitting your eye.
The sky appears blue because of Rayleigh scattering - shorter blue wavelengths scatter more than longer red wavelengths when sunlight interacts with atmospheric molecules.
Sunlight appears white, but it's actually composed of all the colors of the rainbow, each with different wavelengths.
The sky isn't violet because our eyes are less sensitive to violet light and because some violet light gets absorbed by the atmosphere.
During sunsets, light travels through more atmosphere, scattering away more blue light and leaving the red and orange wavelengths to reach our eyes.
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