A Worthington jet, created by a droplet impacting a water surface, acts as a cylindrical lens, inverting the background image.

A Worthington jet, created by a droplet impacting a water surface, acts as a cylindrical lens, inverting the background image.

By Daniel Maguire for Fall 2015 Get Wet.
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Oobleck, a non-Newtonian suspension of cornstarch in water, dances on a loudspeaker, color-reversed.
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While soap added to dyed milk creates a Marangoni (surface tension) driven flow, a droplet of food coloring adds a Worthington jet upon impact with the surface.

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