Saturday, November 5, 2011


Bubbles in a beer bottle.

The bubbles shape themselves so that their surface area is minimal. Where three surfaces meet along one edge, the angles between them are 120 degrees. In a corner where four bubbles meet, the edges extend with the tetrahedral angle. These rules are Plateau's laws.

My few bubbles already look like a foam. Apparently the optimal structure of a foam with bubbles of equal volume is still unknown. The Weaire-Phelan structure is the best one known.


  1. How much physics in our everyday lives! Very fascinating. OL

  2. I have liked bubbles a long time. I am happy it was possible to photograph these.


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