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| Two droplet column 
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clip (630
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| This
characteristic splash is produced by a drop falling from a height of 74 cm
into a wineglass filled almost to
overflowing with water. The
drop's impact initially creates a hemispherical crater surrounded by a
raised rim, which is the familiar crown. As the crater collapses inward, a column of water is thrust upward. A droplet breaks off the top
of the column after reaching its greatest height. As the column recedes,
a second droplet breaks free. The water surface oscillates as
ripples that had traveled outward from the drop site reflect from the
walls of the wine glass. |
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