Question

Determination of surface tension of liquid (water) by the Method of
Ripples

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Answer 1

Explanation:

By setting up ripples on the surface of water, the surface tension can be measured. A small wire connected to a speaker cone driven by a function generator sets up the surface ripples, and a HeNe laser is angled at the water surface. The ripples act as a diffraction grating, yielding interference spots on a screen.