Poisson's (Arago's) Spot was meant as ridicule, and ultimately became one of the definitive experiments to justify the wave theory of light: http://en.wikipedi

Poisson's (Arago's) Spot was meant as ridicule, and ultimately became one of the definitive experiments to justify the wave theory of light: http://en.wikipedia.org/wiki/Arago_spot http://en.wikipedia.org/wiki/Arago_spot Amaze your friends! Shoot light through steel ball bearings with a laser pointer.