FunDoes sand darken when wet?

Does sand darken when wet?

This is true not only for sand but also for wet paper or fabrics. It all has to do with the phenomenon of scattering , that is, the number of collisions that the light beam undergoes before surfacing again. The wet sand grains are covered by a thin film of water . This makes the change of direction of the light rays less and, therefore, more collisions occur than in the case of dry sand.

In fact, the light needs a minimum of six to go outside while it takes two in dry sand. With more collisions, the light loses intensity and therefore we see the wet sand darker.

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