Space & Atmosphere
Why Are Sunsets Red?
Sunsets are red because sunlight travels through far more atmosphere at a low angle, scattering away blue light and leaving only red and orange to reach your eyes.
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Optics & Ocean Science
Why Is the Ocean Blue?
Water is not actually clear. It absorbs red and yellow light and scatters blue. In a glass this is undetectable, but across miles of ocean depth it becomes vivid blue.
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Nature & Physics
Why Is Snow White?
Snow is white because millions of tiny ice crystals scatter all wavelengths of light equally in every direction. Your eyes receive the full spectrum at once, which looks white.
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