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December 17, 2011 02:52 pm PST
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/sWwvabuYfko/howto-make-a-penny-disappear-b.html
HOWTO make a penny disappear by changing the speed of light
A physics teacher created this video showing how to make a wet penny "disappear" by placing a Pyrex beaker over it and filling it up with water, asking why and how this illusion worked. On IO9, Esther Inglis-Arkell explains how the effect is achieved -- it's all down to the strange motion of light in [...]Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/sWwvabuYfko/howto-make-a-penny-disappear-b.html
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