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Old Feb 11th 2009, 05:10 AM   #1
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colour of the wet cloths seems deeper

When the coloured cloths become wet it seems deeper coloured - Why?
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Old Jun 6th 2009, 02:49 AM   #2
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Colour of the wet cloths seems deeper

Light incident on a dry surface bounces directly to your eye with little absorption, while light incident on a wet surface bounces around inside the transparent wet region due to total internal reflection before it reaches your eye. During each bounce the light is absorbed by the wet surface. So more absorption of light occurs in a wet surface, and the surface looks darker.
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