Schlieren Knife-Edge Placement

How do you know where to place your knife-edge for your Schlieren setup? In this video, I'll show you what happens when you put the knife-edge in front of, behind, and exactly at the focus point. After watching, you'll be able to place your knife-edge in the best possible position for your own setup. ===== RELEVANT VIDEOS ===== How To: Build Your Own Schlieren Setup https://goo.gl/TzM8vr How To: DIY Laser Schlieren https://goo.gl/ERghgJ