Tuesday June 22 10:50 pm

Strobe light makes water drops fall in slow motion

Using a reciprocating pump and a strobe light, we can make water drops appear to fall down (or up) in slow motion. This illusion is due to the periodic nature of the pump each droplet forced out of the tube is almost identical to the preceding droplet so our eyes perceive the droplets moving slowly rather than falling quickly. You also can freeze-frame this video and use the ruler to make a crude measurement of the acceleration of gravity. Read more at http //people.cornellcollege.edu/dsherman/waterdrops.html

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