Why do things turn dark when wet?
In: Chemistry
I’ve seen two explanations:
1) Light can bounce around in the layer of water. More bounces -> more chances to be absorbed in the material. More light absorbed -> less light reflected to your eyes.
2) The rough surface of the material normally scatters light in all directions. The layer of water makes the surface smoother, more like a mirror. More of the light gets reflected in one direction, so the surface looks brighter from this direction, and darker from every other direction.
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