A vortex ring of fog, puffed out of a box with a circular orifice leaves a trail like a jelly fish.

A vortex ring of fog, puffed out of a box with a circular orifice leaves a trail like a jelly fish.

By William Derryberry Lael Siler, Kristopher Tierney and Mark Voll for Spring 2014 Team First.
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Fog ring dynamics are used as a mask, revealing a painting.
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The rainbow of colors on a soap bubble indicates that the film thickness is between 0.25 and 1.25 microns.

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