Imagine pouring water on a shirt: when the water is absorbed by the tissue you notice the stain because has a darker colour than the dry tissue. This also works on the asphalt, on the loam, on the wood and in many other things... why?
Asked
Active
Viewed 30 times
4
-
I think surface becomes less reflective due to water molecules. – Neil Libertine Dec 08 '22 at 09:00