Why exactly does pouring water on fabric make it darker?
In: Other
Small things reflect more light than big things, because they have more surface area.
That’s why a block of ice is quite transparent, but a pile of ground-up ice isn’t.
Fabric is mostly tiny strands, so it reflects a lot of the light.
If you make it wet, the water fills in the gaps, so it has less surface area, and reflects less light.
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