High School thickness of skin of soap bubble

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Soap bubbles initially have a thicker skin that becomes thinner over time due to evaporation. The thickness of the bubble's skin can be approximated to be only a few wavelengths of light, which is why rainbow colors appear on the surface. Gravity causes water to flow from the top to the bottom of the bubble, helping to maintain the skin's integrity until it eventually dries out and bursts. The composition of the soap mixture can be adjusted to slow down evaporation rates. Understanding these dynamics is essential for exploring the behavior and lifespan of soap bubbles.
shivakumar
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a soap bubble has a a very skin. is its skin single layered or multi-layered?
Soap bubble are almost circular and tend to take shape of amoeba as it grows larger. The skin seems to same thickness. what can the approximates thickness of soap water bubble have?
 
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The skin starts out thick, but then becomes thinner, as water evaporates from the surface. The soap mix can be selected to reduce the rate of evaporation.

Due to gravity, water from the top of a new bubble, will tend to flow down to the bottom of the bubble. As water evaporates, that reservoir at the bottom, will provide replacement water to the skin, prolonging the life of the bubble, until it dries out and bursts.

If you see rainbow colour patterns in the surface of a bubble, then the skin is only a few wavelengths of light thick. The colours come from light interference, due to different path lengths between the inside and outside surfaces of the envelope.
 

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