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Paint splash

High speed capture of paint rebound.  In this briefest instance, a small weight was dropped into a paint solution.  The resultant recoil of the paint mix was recorded 5 milliseconds after impact.  To catch the moment, a camera needs to be able to film at more than 200 frames per second.

Turning the clock back, we all have fond memories of Millikan's oil drop experiment.  In this extra-ordinary work, Millikan and his colleague Harvey Fletcher, calculated the electrical charge of a single electron.  Because an electron is very small, the corresponding electrical charge is also very small.  Back in 1909, high speed photography was not in wide use and our two scientists had to use a microscope and stop watch arrangement to measure the speed of oil drops falling between to electrically charged plates.

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