thickness of skin of soap bubble

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    Bubble Soap Thickness
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SUMMARY

The thickness of a soap bubble's skin varies as it grows, starting thick and becoming thinner due to evaporation. The soap mixture can be adjusted to slow down this evaporation process. Gravity causes water to flow from the top to the bottom of the bubble, maintaining the skin's integrity until it eventually dries out and bursts. The presence of rainbow colors on the bubble's surface indicates that the skin is only a few wavelengths of light thick, resulting from light interference between the inner and outer surfaces.

PREREQUISITES
  • Understanding of soap bubble formation and properties
  • Knowledge of light interference and wavelengths
  • Familiarity with the effects of evaporation on liquid surfaces
  • Basic principles of fluid dynamics related to gravity
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  • Research the effects of different soap mixtures on bubble longevity
  • Learn about light interference patterns in thin films
  • Explore methods to measure the thickness of soap bubble skins
  • Investigate the role of gravity in fluid dynamics within soap bubbles
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Students of physics, chemists studying surface tension, and anyone interested in the science of soap bubbles and their optical properties.

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TL;DR
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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