Why is foam white no matter the color of the soap?
In: Physics
Imagine looking at a bubble, and how its got all these different kinds of colours on its surface, the reason for this is different thicknesses in the bubble.
Now imagine soapy foam, it’s a multicolored bubble, but there’s thousands/millions of them… your eyeballs aren’t equipped to see such detail, so it gets “averaged out”, and with the combined effects of the light being scattered through all the bubbles, we interpret it as white… which is a good approximation for “all the colours” in our brain
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