See air in a new way with this demonstration of Schlieren videography, which renders tiny changes in the index of refraction of air visible using a set-up consisting of a concave mirror, a point light source, and a razor blade. Harvard University has more information on the principles involved.
Promo: McMillions
Jan 14, 2020
Remember McDonald’s Monopoly? The promotional giveaway game where tiny Monopoly-themed tickets, some of them worth thousands of dollars or...