Moiré Based Schlieren – Andrew Mord
This video was taken by filming hot objects in front of a Moiré pattern, then subtracting a duplicate video offset by a few frames. The result exploits Moiré deflectometry and reveals density gradients in the air. A solder iron shows the lighter density of air around it and propane coming out of a lighter can be seen. Propane soap bubbles are ignited in a hand and decrease the density of surrounding air.
