Blood moon. The reason why the Moon takes on a reddish color during totality is a process called Rayleigh scattering. This is the phenomenon responsible for the sky to be blue and the sun to appear yellow.

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----------Rayleigh Scattering----------- ---------Why is the sky blue?---------- Elastic scattering of light or other electromagnetic radiation by particles (atoms or molecules). It can occur when light travels through transparent solids or liquids - most prominently seen in gases. Rayleigh scattering of sunlight in the atmosphere causes diffuse sky radiation, which is the reason for the blue color of the sky & the yellow tone of the sun itself.

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The Tyndall effect in opalescent glass: it appears blue from the side, but orange light shines through

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Rayleigh scattering - Wikipedia, the free encyclopedia

Blue Sky and Rayleigh Scattering

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Blue Sky and Rayleigh Scattering

Hazel eyes are one of the least understood eye colors. This color is semi-rare and is a combination of several other colors including green and brown. Hazel eyes have less melanin than brown eyes, but more than blue eyes. Hazel eyes often appear to shift in color from brown to green. Hazel eyes are a combination of Rayleigh scattering, the principle that makes the sky and blue eyes appear blue, and melanin, the pigment that makes brown eyes brown.

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Rayleigh scattering - Wikipedia, the free encyclopedia

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