SA Science Lens
2009 Winners

Special Award for Science Promotion

Enlarged view
Photographer: Hannes Pieterse
Title: Eish, the tension!
Description: This physics experiment shows how surface tension in soapy water works. The force acts to keep all of those water and soap molecules together and you can push a wet finger through the frame with the soapy film. A dry finger (or rose, or needle) will push those soap and water molecules away from each other but ... a wet finger is covered in the same kind of water and soap molecules so they just become a part of the network. The bubble in now shaped mostly like a dome and partly like a finger!


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