Fig. 1. Four PS films of diameter D = 22.8 mm and of varying thicknesses floating on the surface of water, each wrinkled by water drops of radius a 0.5 mm and mass m 0.2 mg. As the film is made thicker, the number of wrinkles N decreases (there are 111, 68, 49, and 31 wrinkles in these images), and the length of wrinkles L increases. L is defined as shown at top left, measured from the edge of thewater droplettothe whitecircle. The scale varies between images, whereas the water droplets are approximately the same size. [View Larger Version of this Image (359K JPEG file)]

 

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