Testing the Giant Mirror's Sphericity (Clip)
Date: September 7, 2009
Running Time: 00:04:49
Senior Staff Scientist Thomas Humphrey invents a simple experiment to see if the Giant Mirror is spherical or parabolic, and then to see if it's perfectly spherical. By placing a Styrofoam ball at the center of curvature, he's able to prove that the mirror is out of pure sphericity by about one-quarter of one degree.
View videos from Reflections, a temporary exhibition of exhibits and art installations that let visitors look at their own image as they'd never seen it before.
Visit the Reflections Website
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