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J. Perelman
"Entertaining physics". Book 1.
Chapter 5. Properties of liquids and gases

THAT JUST THINNER?

Few probably know that the film of a soap bubble is one of the most subtle things which are available to the naked vision. Ordinary objects of comparison, employees in our language to Express the subtleties, extremely rough compared to a soap film. “Thin as a hair, thin as tissue paper” - means a huge thickness near the wall thickness of a soap bubble, which is 5000 times thinner than a hair and tissue paper. With magnification of 200 times the human hair has a thickness of about one centimeter incision soap film even in this increase are not yet available vision. Need to increase even 200 times to cut the wall of the bubble was established in the form of a thin line; same hair at this magnification (40000 times!) will have more than 2 m in thickness. The figure gives a visual representation of these relationships.


At the top is the eye of a needle, human hair, Bacillus and spider thread, magnified 200 times.
At the bottom of the bacilli and the thickness of the soap film, enlarged 40000 times. 1 μ=0,0001 see

Entertaining physics J. Perelman

 




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