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Interference
A.k.a. Euler's Identity:

This piece uses our patented new infrared sensing technology on a rear-projected screen. As participants place their hands on the canvas, light emanates in the direction their hand is facing.  When a second hand is placed, the light beams interfere with one another creating brilliant and beautiful interference patterns.  The simulation is actually an accurate scientific visualization of radio-frequency interferometry, and by the time one has played with it for a few minutes one can't help but intuit the meaning and beauty of Euler's equation even if one has never heard of it!

   

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