PIRA 2A20.20 - Surface Tension: Lamella

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Photo Shows the Apparatus Used at U.T. Austin

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Instructions / Notes:

• Start by rotating the circular handle to lift the labjack such that the surface tension ring is fully submerged in the water. Record the force measured by the dynamometer.


• Slowly lower the labjack until you see a lamella form (a raised portion if the water that hugs up against the tension ring - pictured below).


• Once the lamella breaks, measure the force.

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Concepts Conveyed:

• Display the strength of surface tension.


• Determine the amount of energy contained in the lamella.

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Close up of the lamella. It appears as a bubble just below the ring.

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Last Updated 2023 - University of Texas at Austin Physics Dept. - All Rights Reserved.