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The
following photos were taken by Jason Martin, a high-speed
photography student at NCSSM. A Nikon FM2 camera with a 55-mm
macro lens at an aperture of f/16 were used. The flash unit
was a Vivitar 283. Each photo was delayed 0.250 ms from the
previous photo.
The
water drops were released from a height of about three centimeters, just above a solid flat
surface. Upon collision, ripples begin to form near the point
of contact, later extending upward through the drop. The
ripples remain visible as the drop flattens.
After
this set of photos, twelve exposures were taken with the same time
delay in order to check the apparatus for reproducibility. It
was found that the same stage in the collision could be obtained
with time delays varying by several milliseconds. This
explains why some of the reported time delays for the photos seem to
be out of sequence.
First
Photo
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