The Cool Side of Sunset Science

October 07, 2025  •  Leave a Comment

Sunsets appear colorful because of how sunlight interacts with Earth’s atmosphere. As the sun lowers, its light travels through more air, scattering shorter wavelengths like blue and violet. On most days, these colors scatter out of view, leaving reds and oranges behind. But when the air is especially clear or contains fine particles like water vapor, those cooler tones can remain visible. That’s why some sunsets—like this one over Lake Tahoe—show deep blues and purples instead of the usual warm hues.

 


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